useCalendar

Provides the behavior and accessibility implementation for a calendar component. A calendar displays one or more date grids and allows users to select a single date.

install	`yarn add react-aria`
version	3.29.1
usage	`import {useCalendar} from 'react-aria'`

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NPM

API#

useCalendar<T extends DateValue>(
  (props: AriaCalendarProps<T>,
  , state: CalendarState
)): CalendarAria

useCalendarGrid(
  (props: AriaCalendarGridProps,
  , state: CalendarState
    |  | RangeCalendarState
)): CalendarGridAria

useCalendarCell(
  props: AriaCalendarCellProps,
  state: CalendarState
    |  | RangeCalendarState,
  ref: RefObject<HTMLElement>
): CalendarCellAria

Features#

There is no standalone calendar element in HTML. <input type="date"> is close, but this is very limited in functionality, lacking in internationalization capabilities, inconsistent between browsers, and difficult to style. useCalendar helps achieve accessible and international calendar components that can be styled as needed.

Flexible – Display one or more months at once, or a custom time range for use cases like a week view. Minimum and maximum values, unavailable dates, and non-contiguous selections are supported as well.
International – Support for 13 calendar systems used around the world, including Gregorian, Buddhist, Islamic, Persian, and more. Locale-specific formatting, number systems, and right-to-left support are available as well.
Accessible – Calendar cells can be navigated and selected using the keyboard, and localized screen reader messages are included to announce when the selection and visible date range change.
Customizable – As with all of React Aria, the DOM structure and styling of all elements can be fully customized.

Read our blog post for more details about the internationalization, accessibility, and user experience features implemented by useCalendar.

Anatomy#

A calendar consists of a grouping element containing one or more date grids (e.g. months), and a previous and next button for navigating between date ranges. Each calendar grid consists of cells containing button elements that can be pressed and navigated to using the arrow keys to select a date.

useCalendar#

useCalendar returns props that you should spread onto the appropriate elements:

Name	Type	Description
`calendarProps`	`DOMAttributes`	Props for the calendar grouping element.
`nextButtonProps`	`AriaButtonProps`	Props for the next button.
`prevButtonProps`	`AriaButtonProps`	Props for the previous button.
`errorMessageProps`	`DOMAttributes`	Props for the error message element, if any.
`title`	`string`	A description of the visible date range, for use in the calendar title.

useCalendarGrid#

useCalendarGrid returns props for an individual grid of dates, such as one month, along with a list of formatted weekday names in the current locale for use during rendering:

Name	Type	Description
`gridProps`	`DOMAttributes`	Props for the date grid element (e.g. `<table>`).
`headerProps`	`DOMAttributes`	Props for the grid header element (e.g. `<thead>`).
`weekDays`	`string[]`	A list of week day abbreviations formatted for the current locale, typically used in column headers.

useCalendarCell#

useCalendarCell returns props for an individual cell, along with states and information useful during rendering:

Name	Type	Description
`cellProps`	`DOMAttributes`	Props for the grid cell element (e.g. `<td>`).
`buttonProps`	`DOMAttributes`	Props for the button element within the cell.
`isPressed`	`boolean`	Whether the cell is currently being pressed.
`isSelected`	`boolean`	Whether the cell is selected.
`isFocused`	`boolean`	Whether the cell is focused.
`isDisabled`	`boolean`	Whether the cell is disabled, according to the calendar's `minValue`, `maxValue`, and `isDisabled` props. Disabled dates are not focusable, and cannot be selected by the user. They are typically displayed with a dimmed appearance.
`isUnavailable`	`boolean`	Whether the cell is unavailable, according to the calendar's `isDateUnavailable` prop. Unavailable dates remain focusable, but cannot be selected by the user. They should be displayed with a visual affordance to indicate they are unavailable, such as a different color or a strikethrough. Note that because they are focusable, unavailable dates must meet a 4.5:1 color contrast ratio, as defined by WCAG.
`isOutsideVisibleRange`	`boolean`	Whether the cell is outside the visible range of the calendar. For example, dates before the first day of a month in the same week.
`isInvalid`	`boolean`	Whether the cell is part of an invalid selection.
`formattedDate`	`string`	The day number formatted according to the current locale.

State is managed by the useCalendarState hook from @react-stately/calendar. The state object should be passed as an option to useCalendar, useCalendarGrid, and useCalendarCell.

Note that much of this anatomy is shared with range calendars. The only difference is that useCalendarState is used instead of useRangeCalendarState, and useCalendar is used instead of useRangeCalendar.

Date and time values#

Dates are represented in many different ways by cultures around the world. This includes differences in calendar systems, date formatting, numbering systems, weekday and weekend rules, and much more. When building applications that support users around the world, it is important to handle these aspects correctly for each locale.

useCalendar uses the @internationalized/date library to represent dates and times. This package provides a library of objects and functions to perform date and time related manipulation, queries, and conversions that work across locales and calendars. Date and time objects can be converted to and from native JavaScript Date objects or ISO 8601 strings. See the documentation, or the examples below for more details.

useCalendarState requires a createCalendar function to be provided, which is used to implement date manipulation across multiple calendar systems. The default implementation in @internationalized/date includes all supported calendar systems. While this library is quite small (8 kB minified + Brotli), you can reduce its bundle size further by providing your own implementation that includes only your supported calendars. See below for an example.

Example#

A Calendar consists of three components: the main calendar wrapper element with previous and next buttons for navigating, one or more CalendarGrid components to display each month, and CalendarCell components for each date cell. We'll go through them one by one.

For simplicity, this example only displays a single month at a time. See the styled examples section for more examples with multiple months, as well as other time ranges like weeks.

import {useCalendar, useLocale} from 'react-aria';
import {useCalendarState} from 'react-stately';
import {createCalendar} from '@internationalized/date';

// Reuse the Button from your component library. See below for details.
import {Button} from 'your-component-library';

function Calendar(props) {
  let { locale } = useLocale();
  let state = useCalendarState({
    ...props,
    locale,
    createCalendar
  });

  let { calendarProps, prevButtonProps, nextButtonProps, title } = useCalendar(
    props,
    state
  );

  return (
    <div {...calendarProps} className="calendar">
      <div className="header">
        <h2>{title}</h2>
        <Button {...prevButtonProps}>&lt;</Button>
        <Button {...nextButtonProps}>&gt;</Button>
      </div>
      <CalendarGrid state={state} />
    </div>
  );
}

import {useCalendar, useLocale} from 'react-aria';
import {useCalendarState} from 'react-stately';
import {createCalendar} from '@internationalized/date';

// Reuse the Button from your component library. See below for details.
import {Button} from 'your-component-library';

function Calendar(props) {
  let { locale } = useLocale();
  let state = useCalendarState({
    ...props,
    locale,
    createCalendar
  });

  let {
    calendarProps,
    prevButtonProps,
    nextButtonProps,
    title
  } = useCalendar(props, state);

  return (
    <div {...calendarProps} className="calendar">
      <div className="header">
        <h2>{title}</h2>
        <Button {...prevButtonProps}>&lt;</Button>
        <Button {...nextButtonProps}>&gt;</Button>
      </div>
      <CalendarGrid state={state} />
    </div>
  );
}

import {
  useCalendar,
  useLocale
} from 'react-aria';
import {useCalendarState} from 'react-stately';
import {createCalendar} from '@internationalized/date';

// Reuse the Button from your component library. See below for details.
import {Button} from 'your-component-library';

function Calendar(
  props
) {
  let { locale } =
    useLocale();
  let state =
    useCalendarState({
      ...props,
      locale,
      createCalendar
    });

  let {
    calendarProps,
    prevButtonProps,
    nextButtonProps,
    title
  } = useCalendar(
    props,
    state
  );

  return (
    <div
      {...calendarProps}
      className="calendar"
    >
      <div className="header">
        <h2>{title}</h2>
        <Button
          {...prevButtonProps}
        >
          &lt;
        </Button>
        <Button
          {...nextButtonProps}
        >
          &gt;
        </Button>
      </div>
      <CalendarGrid
        state={state}
      />
    </div>
  );
}

CalendarGrid#

The CalendarGrid component will be responsible for rendering an individual month. It is a separate component so that you can render more than one month at a time if you like. It's rendered as an HTML <table> element, and React Aria takes care of adding the proper ARIA roles and event handlers to make it behave as an ARIA grid. You can use the arrow keys to navigate between cells, and the Enter key to select a date.

The state.getDatesInWeek function returns the dates in each week of the month. Note that this always includes 7 values, but some of them may be null, which indicates that the date doesn't exist within the calendar system. You should render a placeholder <td> element in this case so that the cells line up correctly.

Note: this component is the same as the CalendarGrid component shown in the useRangeCalendar docs, and you can reuse it between both Calendar and RangeCalendar.

import {useCalendarGrid} from 'react-aria';
import {getWeeksInMonth} from '@internationalized/date';

function CalendarGrid({ state, ...props }) {
  let { locale } = useLocale();
  let { gridProps, headerProps, weekDays } = useCalendarGrid(props, state);

  // Get the number of weeks in the month so we can render the proper number of rows.
  let weeksInMonth = getWeeksInMonth(state.visibleRange.start, locale);

  return (
    <table {...gridProps}>
      <thead {...headerProps}>
        <tr>
          {weekDays.map((day, index) => <th key={index}>{day}</th>)}
        </tr>
      </thead>
      <tbody>
        {[...new Array(weeksInMonth).keys()].map((weekIndex) => (
          <tr key={weekIndex}>
            {state.getDatesInWeek(weekIndex).map((date, i) => (
              date
                ? (
                  <CalendarCell
                    key={i}
                    state={state}
                    date={date}
                  />
                )
                : <td key={i} />
            ))}
          </tr>
        ))}
      </tbody>
    </table>
  );
}

import {useCalendarGrid} from 'react-aria';
import {getWeeksInMonth} from '@internationalized/date';

function CalendarGrid({ state, ...props }) {
  let { locale } = useLocale();
  let { gridProps, headerProps, weekDays } =
    useCalendarGrid(props, state);

  // Get the number of weeks in the month so we can render the proper number of rows.
  let weeksInMonth = getWeeksInMonth(
    state.visibleRange.start,
    locale
  );

  return (
    <table {...gridProps}>
      <thead {...headerProps}>
        <tr>
          {weekDays.map((day, index) => (
            <th key={index}>{day}</th>
          ))}
        </tr>
      </thead>
      <tbody>
        {[...new Array(weeksInMonth).keys()].map(
          (weekIndex) => (
            <tr key={weekIndex}>
              {state.getDatesInWeek(weekIndex).map((
                date,
                i
              ) => (
                date
                  ? (
                    <CalendarCell
                      key={i}
                      state={state}
                      date={date}
                    />
                  )
                  : <td key={i} />
              ))}
            </tr>
          )
        )}
      </tbody>
    </table>
  );
}

import {useCalendarGrid} from 'react-aria';
import {getWeeksInMonth} from '@internationalized/date';

function CalendarGrid(
  { state, ...props }
) {
  let { locale } =
    useLocale();
  let {
    gridProps,
    headerProps,
    weekDays
  } = useCalendarGrid(
    props,
    state
  );

  // Get the number of weeks in the month so we can render the proper number of rows.
  let weeksInMonth =
    getWeeksInMonth(
      state.visibleRange
        .start,
      locale
    );

  return (
    <table
      {...gridProps}
    >
      <thead
        {...headerProps}
      >
        <tr>
          {weekDays.map((
            day,
            index
          ) => (
            <th
              key={index}
            >
              {day}
            </th>
          ))}
        </tr>
      </thead>
      <tbody>
        {[...new Array(
          weeksInMonth
        ).keys()].map(
          (weekIndex) => (
            <tr
              key={weekIndex}
            >
              {state
                .getDatesInWeek(
                  weekIndex
                ).map((
                  date,
                  i
                ) => (
                  date
                    ? (
                      <CalendarCell
                        key={i}
                        state={state}
                        date={date}
                      />
                    )
                    : (
                      <td
                        key={i}
                      />
                    )
                ))}
            </tr>
          )
        )}
      </tbody>
    </table>
  );
}

CalendarCell#

Finally, the CalendarCell component renders an individual cell in a calendar. It consists of two elements: a <td> to represent the grid cell, and a <div> to represent a button that can be clicked to select the date. The useCalendarCell hook also returns the formatted date string in the current locale, as well as some information about the cell's state that can be useful for styling. See above for details.

Note: this component is the same as the CalendarCell component shown in the useRangeCalendar docs, and you can reuse it between both Calendar and RangeCalendar.

import {useCalendarCell} from 'react-aria';

function CalendarCell({ state, date }) {
  let ref = React.useRef(null);
  let {
    cellProps,
    buttonProps,
    isSelected,
    isOutsideVisibleRange,
    isDisabled,
    isUnavailable,
    formattedDate
  } = useCalendarCell({ date }, state, ref);

  return (
    <td {...cellProps}>
      <div
        {...buttonProps}
        ref={ref}
        hidden={isOutsideVisibleRange}
        className={`cell ${isSelected ? 'selected' : ''} ${
          isDisabled ? 'disabled' : ''
        } ${isUnavailable ? 'unavailable' : ''}`}
      >
        {formattedDate}
      </div>
    </td>
  );
}

import {useCalendarCell} from 'react-aria';

function CalendarCell({ state, date }) {
  let ref = React.useRef(null);
  let {
    cellProps,
    buttonProps,
    isSelected,
    isOutsideVisibleRange,
    isDisabled,
    isUnavailable,
    formattedDate
  } = useCalendarCell({ date }, state, ref);

  return (
    <td {...cellProps}>
      <div
        {...buttonProps}
        ref={ref}
        hidden={isOutsideVisibleRange}
        className={`cell ${isSelected ? 'selected' : ''} ${
          isDisabled ? 'disabled' : ''
        } ${isUnavailable ? 'unavailable' : ''}`}
      >
        {formattedDate}
      </div>
    </td>
  );
}

import {useCalendarCell} from 'react-aria';

function CalendarCell(
  { state, date }
) {
  let ref = React.useRef(
    null
  );
  let {
    cellProps,
    buttonProps,
    isSelected,
    isOutsideVisibleRange,
    isDisabled,
    isUnavailable,
    formattedDate
  } = useCalendarCell(
    { date },
    state,
    ref
  );

  return (
    <td {...cellProps}>
      <div
        {...buttonProps}
        ref={ref}
        hidden={isOutsideVisibleRange}
        className={`cell ${
          isSelected
            ? 'selected'
            : ''
        } ${
          isDisabled
            ? 'disabled'
            : ''
        } ${
          isUnavailable
            ? 'unavailable'
            : ''
        }`}
      >
        {formattedDate}
      </div>
    </td>
  );
}

That's it! Now we can render an example of our Calendar component in action.

<Calendar aria-label="Event date" />

<Calendar aria-label="Event date" />

<Calendar aria-label="Event date" />

Show CSS

.calendar {
  width: 220px;
}

.header {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0 8px;
}

.header h2 {
  flex: 1;
  margin: 0;
}

.calendar table {
  width: 100%;
}

.cell {
  cursor: default;
  text-align: center;
}

.selected {
  background: var(--blue);
  color: white;
}

.unavailable {
  color: var(--spectrum-global-color-red-600);
}

.disabled {
  color: gray;
}

.calendar {
  width: 220px;
}

.header {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0 8px;
}

.header h2 {
  flex: 1;
  margin: 0;
}

.calendar table {
  width: 100%;
}

.cell {
  cursor: default;
  text-align: center;
}

.selected {
  background: var(--blue);
  color: white;
}

.unavailable {
  color: var(--spectrum-global-color-red-600);
}

.disabled {
  color: gray;
}

.calendar {
  width: 220px;
}

.header {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0 8px;
}

.header h2 {
  flex: 1;
  margin: 0;
}

.calendar table {
  width: 100%;
}

.cell {
  cursor: default;
  text-align: center;
}

.selected {
  background: var(--blue);
  color: white;
}

.unavailable {
  color: var(--spectrum-global-color-red-600);
}

.disabled {
  color: gray;
}

Button#

The Button component is used in the above example to navigate between months. It is built using the useButton hook, and can be shared with many other components.

Show code

import {useButton} from 'react-aria';

function Button(props) {
  let ref = React.useRef(null);
  let { buttonProps } = useButton(props, ref);
  return <button {...buttonProps} ref={ref}>{props.children}</button>;
}

import {useButton} from 'react-aria';

function Button(props) {
  let ref = React.useRef(null);
  let { buttonProps } = useButton(props, ref);
  return (
    <button {...buttonProps} ref={ref}>
      {props.children}
    </button>
  );
}

import {useButton} from 'react-aria';

function Button(props) {
  let ref = React.useRef(
    null
  );
  let { buttonProps } =
    useButton(
      props,
      ref
    );
  return (
    <button
      {...buttonProps}
      ref={ref}
    >
      {props.children}
    </button>
  );
}

Styled Examples#

Tailwind CSS

A Calendar built with Tailwind, supporting multiple visible months.

Styled Components

A week view component, built with Styled Components.

CSS Modules

A Calendar with custom month and year dropdowns, styled with CSS Modules.

Usage#

The following examples show how to use the Calendar component created in the above example.

Value#

A Calendar has no selection by default. An initial, uncontrolled value can be provided to the Calendar using the defaultValue prop. Alternatively, a controlled value can be provided using the value prop.

Date values are provided using objects in the @internationalized/date package. This library handles correct international date manipulation across calendars, time zones, and other localization concerns.

useCalendar supports values with both date and time components, but only allows users to modify the date. By default, useCalendar will emit CalendarDate objects in the onChange event, but if a CalendarDateTime or ZonedDateTime object is passed as the value or defaultValue, values of that type will be emitted, changing only the date and preserving the time components.

import {parseDate} from '@internationalized/date';

function Example() {
  let [value, setValue] = React.useState(parseDate('2020-02-03'));

  return (
    <div style={{display: 'flex', gap: 20, flexWrap: 'wrap'}}>
      <Calendar
        aria-label="Date (uncontrolled)"
        defaultValue={parseDate('2020-02-03')} />
      <Calendar
        aria-label="Date (controlled)"
        value={value}
        onChange={setValue} />
    </div>
  );
}

import {parseDate} from '@internationalized/date';

function Example() {
  let [value, setValue] = React.useState(
    parseDate('2020-02-03')
  );

  return (
    <div
      style={{ display: 'flex', gap: 20, flexWrap: 'wrap' }}
    >
      <Calendar
        aria-label="Date (uncontrolled)"
        defaultValue={parseDate('2020-02-03')}
      />
      <Calendar
        aria-label="Date (controlled)"
        value={value}
        onChange={setValue}
      />
    </div>
  );
}

import {parseDate} from '@internationalized/date';

function Example() {
  let [value, setValue] =
    React.useState(
      parseDate(
        '2020-02-03'
      )
    );

  return (
    <div
      style={{
        display: 'flex',
        gap: 20,
        flexWrap: 'wrap'
      }}
    >
      <Calendar
        aria-label="Date (uncontrolled)"
        defaultValue={parseDate(
          '2020-02-03'
        )}
      />
      <Calendar
        aria-label="Date (controlled)"
        value={value}
        onChange={setValue}
      />
    </div>
  );
}

Events#

useCalendar accepts an onChange prop which is triggered whenever a date is selected by the user. The example below uses onChange to update a separate element with a formatted version of the date in the user's locale. This is done by converting the date to a native JavaScript Date object to pass to the formatter.

import {useDateFormatter} from 'react-aria';
import {getLocalTimeZone} from '@internationalized/date';

function Example() {
  let [date, setDate] = React.useState(parseDate('2022-07-04'));
  let formatter = useDateFormatter({ dateStyle: 'full' });

  return (
    <>
      <Calendar aria-label="Event date" value={date} onChange={setDate} />
      <p>Selected date: {formatter.format(date.toDate(getLocalTimeZone()))}</p>
    </>
  );
}

import {useDateFormatter} from 'react-aria';
import {getLocalTimeZone} from '@internationalized/date';

function Example() {
  let [date, setDate] = React.useState(
    parseDate('2022-07-04')
  );
  let formatter = useDateFormatter({ dateStyle: 'full' });

  return (
    <>
      <Calendar
        aria-label="Event date"
        value={date}
        onChange={setDate}
      />
      <p>
        Selected date:{' '}
        {formatter.format(date.toDate(getLocalTimeZone()))}
      </p>
    </>
  );
}

import {useDateFormatter} from 'react-aria';
import {getLocalTimeZone} from '@internationalized/date';

function Example() {
  let [date, setDate] =
    React.useState(
      parseDate(
        '2022-07-04'
      )
    );
  let formatter =
    useDateFormatter({
      dateStyle: 'full'
    });

  return (
    <>
      <Calendar
        aria-label="Event date"
        value={date}
        onChange={setDate}
      />
      <p>
        Selected date:
        {' '}
        {formatter
          .format(
            date.toDate(
              getLocalTimeZone()
            )
          )}
      </p>
    </>
  );
}

International calendars#

useCalendar supports selecting dates in many calendar systems used around the world, including Gregorian, Hebrew, Indian, Islamic, Buddhist, and more. Dates are automatically displayed in the appropriate calendar system for the user's locale. The calendar system can be overridden using the Unicode calendar locale extension, passed to the I18nProvider component.

Selected dates passed to onChange always use the same calendar system as the value or defaultValue prop. If no value or defaultValue is provided, then dates passed to onChange are always in the Gregorian calendar since this is the most commonly used. This means that even though the user selects dates in their local calendar system, applications are able to deal with dates from all users consistently.

The below example displays a Calendar in the Hindi language, using the Indian calendar. Dates emitted from onChange are in the Gregorian calendar.

import {I18nProvider} from 'react-aria';

function Example() {
  let [date, setDate] = React.useState(null);
  return (
    <I18nProvider locale="hi-IN-u-ca-indian">
      <Calendar aria-label="Date" value={date} onChange={setDate} />
      <p>Selected date: {date?.toString()}</p>
    </I18nProvider>
  );
}

import {I18nProvider} from 'react-aria';

function Example() {
  let [date, setDate] = React.useState(null);
  return (
    <I18nProvider locale="hi-IN-u-ca-indian">
      <Calendar
        aria-label="Date"
        value={date}
        onChange={setDate}
      />
      <p>Selected date: {date?.toString()}</p>
    </I18nProvider>
  );
}

import {I18nProvider} from 'react-aria';

function Example() {
  let [date, setDate] =
    React.useState(null);
  return (
    <I18nProvider locale="hi-IN-u-ca-indian">
      <Calendar
        aria-label="Date"
        value={date}
        onChange={setDate}
      />
      <p>
        Selected date:
        {' '}
        {date
          ?.toString()}
      </p>
    </I18nProvider>
  );
}

Validation#

By default, useCalendar allows selecting any date. The minValue and maxValue props can also be used to prevent the user from selecting dates outside a certain range.

This example only accepts dates after today.

import {today} from '@internationalized/date';

<Calendar
  aria-label="Appointment date"
  minValue={today(getLocalTimeZone())}
/>

import {today} from '@internationalized/date';

<Calendar
  aria-label="Appointment date"
  minValue={today(getLocalTimeZone())}
/>

import {today} from '@internationalized/date';

<Calendar
  aria-label="Appointment date"
  minValue={today(
    getLocalTimeZone()
  )}
/>

Unavailable dates#

useCalendar supports marking certain dates as unavailable. These dates remain focusable with the keyboard so that navigation is consistent, but cannot be selected by the user. In this example, they are displayed in red. The isDateUnavailable prop accepts a callback that is called to evaluate whether each visible date is unavailable.

This example includes multiple unavailable date ranges, e.g. dates when no appointments are available. In addition, all weekends are unavailable. The minValue prop is also used to prevent selecting dates before today.

import {useLocale} from 'react-aria';
import {isWeekend, today} from '@internationalized/date';

function Example() {
  let now = today(getLocalTimeZone());
  let disabledRanges = [
    [now, now.add({ days: 5 })],
    [now.add({ days: 14 }), now.add({ days: 16 })],
    [now.add({ days: 23 }), now.add({ days: 24 })]
  ];

  let { locale } = useLocale();
  let isDateUnavailable = (date) =>
    isWeekend(date, locale) ||
    disabledRanges.some((interval) =>
      date.compare(interval[0]) >= 0 && date.compare(interval[1]) <= 0
    );

  return (
    <Calendar
      aria-label="Appointment date"
      minValue={today(getLocalTimeZone())}
      isDateUnavailable={isDateUnavailable}
    />
  );
}

import {useLocale} from 'react-aria';
import {isWeekend, today} from '@internationalized/date';

function Example() {
  let now = today(getLocalTimeZone());
  let disabledRanges = [
    [now, now.add({ days: 5 })],
    [now.add({ days: 14 }), now.add({ days: 16 })],
    [now.add({ days: 23 }), now.add({ days: 24 })]
  ];

  let { locale } = useLocale();
  let isDateUnavailable = (date) =>
    isWeekend(date, locale) ||
    disabledRanges.some((interval) =>
      date.compare(interval[0]) >= 0 &&
      date.compare(interval[1]) <= 0
    );

  return (
    <Calendar
      aria-label="Appointment date"
      minValue={today(getLocalTimeZone())}
      isDateUnavailable={isDateUnavailable}
    />
  );
}

import {useLocale} from 'react-aria';
import {
  isWeekend,
  today
} from '@internationalized/date';

function Example() {
  let now = today(
    getLocalTimeZone()
  );
  let disabledRanges = [
    [
      now,
      now.add({
        days: 5
      })
    ],
    [
      now.add({
        days: 14
      }),
      now.add({
        days: 16
      })
    ],
    [
      now.add({
        days: 23
      }),
      now.add({
        days: 24
      })
    ]
  ];

  let { locale } =
    useLocale();
  let isDateUnavailable =
    (date) =>
      isWeekend(
        date,
        locale
      ) ||
      disabledRanges
        .some((
          interval
        ) =>
          date.compare(
              interval[0]
            ) >= 0 &&
          date.compare(
              interval[1]
            ) <= 0
        );

  return (
    <Calendar
      aria-label="Appointment date"
      minValue={today(
        getLocalTimeZone()
      )}
      isDateUnavailable={isDateUnavailable}
    />
  );
}

Controlling the focused date#

By default, the selected date is focused when a Calendar first mounts. If no value or defaultValue prop is provided, then the current date is focused. However, useCalendar supports controlling which date is focused using the focusedValue and onFocusChange props. This also determines which month is visible. The defaultFocusedValue prop allows setting the initial focused date when the Calendar first mounts, without controlling it.

This example focuses July 1, 2021 by default. The user may change the focused date, and the onFocusChange event updates the state. Clicking the button resets the focused date back to the initial value.

import {CalendarDate} from '@internationalized/date';

function Example() {
  let defaultDate = new CalendarDate(2021, 7, 1);
  let [focusedDate, setFocusedDate] = React.useState(defaultDate);

  return (
    <div style={{ flexDirection: 'column', alignItems: 'start', gap: 20 }}>
      <button onClick={() => setFocusedDate(defaultDate)}>
        Reset focused date
      </button>
      <Calendar focusedValue={focusedDate} onFocusChange={setFocusedDate} />
    </div>
  );
}

import {CalendarDate} from '@internationalized/date';

function Example() {
  let defaultDate = new CalendarDate(2021, 7, 1);
  let [focusedDate, setFocusedDate] = React.useState(
    defaultDate
  );

  return (
    <div
      style={{
        flexDirection: 'column',
        alignItems: 'start',
        gap: 20
      }}
    >
      <button onClick={() => setFocusedDate(defaultDate)}>
        Reset focused date
      </button>
      <Calendar
        focusedValue={focusedDate}
        onFocusChange={setFocusedDate}
      />
    </div>
  );
}

import {CalendarDate} from '@internationalized/date';

function Example() {
  let defaultDate =
    new CalendarDate(
      2021,
      7,
      1
    );
  let [
    focusedDate,
    setFocusedDate
  ] = React.useState(
    defaultDate
  );

  return (
    <div
      style={{
        flexDirection:
          'column',
        alignItems:
          'start',
        gap: 20
      }}
    >
      <button
        onClick={() =>
          setFocusedDate(
            defaultDate
          )}
      >
        Reset focused
        date
      </button>
      <Calendar
        focusedValue={focusedDate}
        onFocusChange={setFocusedDate}
      />
    </div>
  );
}

Disabled#

The isDisabled boolean prop makes the Calendar disabled. Cells cannot be focused or selected.

<Calendar aria-label="Event date" isDisabled />

<Calendar aria-label="Event date" isDisabled />

<Calendar
  aria-label="Event date"
  isDisabled
/>

Read only#

The isReadOnly boolean prop makes the Calendar's value immutable. Unlike isDisabled, the Calendar remains focusable.

<Calendar
  aria-label="Event date"
  value={today(getLocalTimeZone())}
  isReadOnly
/>

<Calendar
  aria-label="Event date"
  value={today(getLocalTimeZone())}
  isReadOnly
/>

<Calendar
  aria-label="Event date"
  value={today(
    getLocalTimeZone()
  )}
  isReadOnly
/>

Labeling#

An aria-label must be provided to the Calendar for accessibility. If it is labeled by a separate element, an aria-labelledby prop must be provided using the id of the labeling element instead.

Internationalization#

In order to internationalize a Calendar, a localized string should be passed to the aria-label prop. For languages that are read right-to-left (e.g. Hebrew and Arabic), keyboard navigation is automatically flipped. Ensure that your CSS accounts for this as well. Dates are automatically formatted using the current locale.

Advanced topics#

Reducing bundle size#

In the example above, the createCalendar function from the @internationalized/date package is passed to the useCalendarState hook. This function receives a calendar identifier string, and provides Calendar instances to React Stately, which are used to implement date manipulation.

By default, this includes all calendar systems supported by @internationalized/date. However, if your application supports a more limited set of regions, or you know you will only be picking dates in a certain calendar system, you can reduce your bundle size by providing your own implementation of createCalendar that includes a subset of these Calendar implementations.

For example, if your application only supports Gregorian dates, you could implement a createCalendar function like this:

import {useLocale} from 'react-aria';
import {useCalendarState} from 'react-stately';
import {GregorianCalendar} from '@internationalized/date';

function createCalendar(identifier) {
  switch (identifier) {
    case 'gregory':
      return new GregorianCalendar();
    default:
      throw new Error(`Unsupported calendar ${identifier}`);
  }
}

function Calendar(props) {
  let { locale } = useLocale();
  let state = useCalendarState({
    ...props,
    locale,
    createCalendar
  });

  // ...
}

import {useLocale} from 'react-aria';
import {useCalendarState} from 'react-stately';
import {GregorianCalendar} from '@internationalized/date';

function createCalendar(identifier) {
  switch (identifier) {
    case 'gregory':
      return new GregorianCalendar();
    default:
      throw new Error(`Unsupported calendar ${identifier}`);
  }
}

function Calendar(props) {
  let { locale } = useLocale();
  let state = useCalendarState({
    ...props,
    locale,
    createCalendar
  });

  // ...
}

import {useLocale} from 'react-aria';
import {useCalendarState} from 'react-stately';
import {GregorianCalendar} from '@internationalized/date';

function createCalendar(
  identifier
) {
  switch (identifier) {
    case 'gregory':
      return new GregorianCalendar();
    default:
      throw new Error(
        `Unsupported calendar ${identifier}`
      );
  }
}

function Calendar(
  props
) {
  let { locale } =
    useLocale();
  let state =
    useCalendarState({
      ...props,
      locale,
      createCalendar
    });

  // ...
}

This way, only GregorianCalendar is imported, and the other calendar implementations can be tree-shaken.

See the Calendar documentation in @internationalized/date to learn more about the supported calendar systems, and a list of string identifiers.

CalendarDate
  | CalendarDateTime
  | ZonedDateTime

A CalendarDate represents a date without any time components in a specific calendar system.

Properties

Name	Type	Description
`calendar`	`Calendar`	The calendar system associated with this date, e.g. Gregorian.
`era`	`string`	The calendar era for this date, e.g. "BC" or "AD".
`year`	`number`	The year of this date within the era.
`month`	`number`	The month number within the year. Note that some calendar systems such as Hebrew may have a variable number of months per year. Therefore, month numbers may not always correspond to the same month names in different years.
`day`	`number`	The day number within the month.

Methods

Method	Description
`constructor( (...args: any[] )): void`
`copy(): CalendarDate`	Returns a copy of this date.
`add( (duration: DateDuration )): CalendarDate`	Returns a new `CalendarDate` with the given duration added to it.
`subtract( (duration: DateDuration )): CalendarDate`	Returns a new `CalendarDate` with the given duration subtracted from it.
`set( (fields: DateFields )): CalendarDate`	Returns a new `CalendarDate` with the given fields set to the provided values. Other fields will be constrained accordingly.
`cycle( field: DateField, amount: number, options?: CycleOptions ): CalendarDate`	Returns a new `CalendarDate` with the given field adjusted by a specified amount. When the resulting value reaches the limits of the field, it wraps around.
`toDate( (timeZone: string )): Date`	Converts the date to a native JavaScript Date object, with the time set to midnight in the given time zone.
`toString(): string`	Converts the date to an ISO 8601 formatted string.
`compare( (b: AnyCalendarDate )): number`	Compares this date with another. A negative result indicates that this date is before the given one, and a positive date indicates that it is after.

A CalendarDateTime represents a date and time without a time zone, in a specific calendar system.

Properties

Name	Type	Description
`calendar`	`Calendar`	The calendar system associated with this date, e.g. Gregorian.
`era`	`string`	The calendar era for this date, e.g. "BC" or "AD".
`year`	`number`	The year of this date within the era.
`month`	`number`	The month number within the year. Note that some calendar systems such as Hebrew may have a variable number of months per year. Therefore, month numbers may not always correspond to the same month names in different years.
`day`	`number`	The day number within the month.
`hour`	`number`	The hour in the day, numbered from 0 to 23.
`minute`	`number`	The minute in the hour.
`second`	`number`	The second in the minute.
`millisecond`	`number`	The millisecond in the second.

Methods

Method	Description
`constructor( (...args: any[] )): void`
`copy(): CalendarDateTime`	Returns a copy of this date.
`add( (duration: DateTimeDuration )): CalendarDateTime`	Returns a new `CalendarDateTime` with the given duration added to it.
`subtract( (duration: DateTimeDuration )): CalendarDateTime`	Returns a new `CalendarDateTime` with the given duration subtracted from it.
`set( (fields: DateFields & & TimeFields )): CalendarDateTime`	Returns a new `CalendarDateTime` with the given fields set to the provided values. Other fields will be constrained accordingly.
`cycle( field: DateField \| \| TimeField, amount: number, options?: CycleTimeOptions ): CalendarDateTime`	Returns a new `CalendarDateTime` with the given field adjusted by a specified amount. When the resulting value reaches the limits of the field, it wraps around.
`toDate( (timeZone: string, , disambiguation?: Disambiguation )): Date`	Converts the date to a native JavaScript Date object in the given time zone.
`toString(): string`	Converts the date to an ISO 8601 formatted string.
`compare( (b: CalendarDate \| CalendarDateTime \| ZonedDateTime )): number`	Compares this date with another. A negative result indicates that this date is before the given one, and a positive date indicates that it is after.

A ZonedDateTime represents a date and time in a specific time zone and calendar system.

Properties

Name	Type	Description
`calendar`	`Calendar`	The calendar system associated with this date, e.g. Gregorian.
`era`	`string`	The calendar era for this date, e.g. "BC" or "AD".
`year`	`number`	The year of this date within the era.
`month`	`number`	The month number within the year. Note that some calendar systems such as Hebrew may have a variable number of months per year. Therefore, month numbers may not always correspond to the same month names in different years.
`day`	`number`	The day number within the month.
`hour`	`number`	The hour in the day, numbered from 0 to 23.
`minute`	`number`	The minute in the hour.
`second`	`number`	The second in the minute.
`millisecond`	`number`	The millisecond in the second.
`timeZone`	`string`	The IANA time zone identifier that this date and time is represented in.
`offset`	`number`	The UTC offset for this time, in milliseconds.

Methods

Method	Description
`constructor( (...args: any[] )): void`
`copy(): ZonedDateTime`	Returns a copy of this date.
`add( (duration: DateTimeDuration )): void`	Returns a new `ZonedDateTime` with the given duration added to it.
`subtract( (duration: DateTimeDuration )): void`	Returns a new `ZonedDateTime` with the given duration subtracted from it.
`set( (fields: DateFields & & TimeFields, , disambiguation?: Disambiguation )): void`	Returns a new `ZonedDateTime` with the given fields set to the provided values. Other fields will be constrained accordingly.
`cycle( field: DateField \| \| TimeField, amount: number, options?: CycleTimeOptions ): void`	Returns a new `ZonedDateTime` with the given field adjusted by a specified amount. When the resulting value reaches the limits of the field, it wraps around.
`toDate(): void`	Converts the date to a native JavaScript Date object.
`toString(): void`	Converts the date to an ISO 8601 formatted string, including the UTC offset and time zone identifier.
`toAbsoluteString(): void`	Converts the date to an ISO 8601 formatted string in UTC.
`compare( (b: CalendarDate \| CalendarDateTime \| ZonedDateTime )): void`	Compares this date with another. A negative result indicates that this date is before the given one, and a positive date indicates that it is after.

Name	Type	Default	Description
`minValue`	`DateValue`	—	The minimum allowed date that a user may select.
`maxValue`	`DateValue`	—	The maximum allowed date that a user may select.
`isDateUnavailable`	`( (date: DateValue )) => boolean`	—	Callback that is called for each date of the calendar. If it returns true, then the date is unavailable.
`isDisabled`	`boolean`	`false`	Whether the calendar is disabled.
`isReadOnly`	`boolean`	`false`	Whether the calendar value is immutable.
`autoFocus`	`boolean`	`false`	Whether to automatically focus the calendar when it mounts.
`focusedValue`	`DateValue`	—	Controls the currently focused date within the calendar.
`defaultFocusedValue`	`DateValue`	—	The date that is focused when the calendar first mounts (uncountrolled).
`onFocusChange`	`( (date: CalendarDate )) => void`	—	Handler that is called when the focused date changes.
`isInvalid`	`boolean`	—	Whether the current selection is invalid according to application logic.
`errorMessage`	`ReactNode`	—	An error message to display when the selected value is invalid.
`pageBehavior`	`PageBehavior`	`visible`	Controls the behavior of paging. Pagination either works by advancing the visible page by visibleDuration (default) or one unit of visibleDuration.
`value`	`DateValue \| null`	—	The current value (controlled).
`defaultValue`	`DateValue \| null`	—	The default value (uncontrolled).
`onChange`	`( (value: MappedDateValue<DateValue> )) => void`	—	Handler that is called when the value changes.
`id`	`string`	—	The element's unique identifier. See MDN.
`aria-label`	`string`	—	Defines a string value that labels the current element.
`aria-labelledby`	`string`	—	Identifies the element (or elements) that labels the current element.
`aria-describedby`	`string`	—	Identifies the element (or elements) that describes the object.
`aria-details`	`string`	—	Identifies the element (or elements) that provide a detailed, extended description for the object.

'valid' | 'invalid'

'single' | 'visible'

DateValue extends ZonedDateTime ? ZonedDateTime :
DateValue extends CalendarDateTime ? CalendarDateTime :
DateValue extends CalendarDate ? CalendarDate : never

Properties

Name	Type	Description
`value`	`CalendarDate`	The currently selected date.
`isDisabled`	`boolean`	Whether the calendar is disabled.
`isReadOnly`	`boolean`	Whether the calendar is in a read only state.
`visibleRange`	`RangeValue<CalendarDate>`	The date range that is currently visible in the calendar.
`timeZone`	`string`	The time zone of the dates currently being displayed.
`isValueInvalid`	`boolean`	Whether the calendar is invalid.
`focusedDate`	`CalendarDate`	The currently focused date.
`isFocused`	`boolean`	Whether focus is currently within the calendar.
`minValue`	`DateValue`	The minimum allowed date that a user may select.
`maxValue`	`DateValue`	The maximum allowed date that a user may select.

Methods

Method	Description
`setValue( (value: CalendarDate )): void`	Sets the currently selected date.
`setFocusedDate( (value: CalendarDate )): void`	Sets the focused date.
`focusNextDay(): void`	Moves focus to the next calendar date.
`focusPreviousDay(): void`	Moves focus to the previous calendar date.
`focusNextRow(): void`	Moves focus to the next row of dates, e.g. the next week.
`focusPreviousRow(): void`	Moves focus to the previous row of dates, e.g. the previous work.
`focusNextPage(): void`	Moves focus to the next page of dates, e.g. the next month if one month is visible.
`focusPreviousPage(): void`	Moves focus to the previous page of dates, e.g. the previous month if one month is visible.
`focusSectionStart(): void`	Moves focus to the start of the current section of dates, e.g. the start of the current month.
`focusSectionEnd(): void`	Moves focus to the end of the current section of dates, e.g. the end of the current month month.
`focusNextSection( (larger?: boolean )): void`	Moves focus to the next section of dates based on what is currently displayed. By default, focus is moved by one of the currently displayed unit. For example, if one or more months are displayed, then focus is moved forward by one month. If the `larger` option is `true`, the focus is moved by the next larger unit than the one displayed. For example, if months are displayed, then focus moves to the next year.
`focusPreviousSection( (larger?: boolean )): void`	Moves focus to the previous section of dates based on what is currently displayed. By default, focus is moved by one of the currently displayed unit. For example, if one or more months are displayed, then focus is moved backward by one month. If the `larger` option is `true`, the focus is moved by the next larger unit than the one displayed. For example, if months are displayed, then focus moves to the previous year.
`selectFocusedDate(): void`	Selects the currently focused date.
`selectDate( (date: CalendarDate )): void`	Selects the given date.
`setFocused( (value: boolean )): void`	Sets whether focus is currently within the calendar.
`isInvalid( (date: CalendarDate )): boolean`	Returns whether the given date is invalid according to the `minValue` and `maxValue` props.
`isSelected( (date: CalendarDate )): boolean`	Returns whether the given date is currently selected.
`isCellFocused( (date: CalendarDate )): boolean`	Returns whether the given date is currently focused.
`isCellDisabled( (date: CalendarDate )): boolean`	Returns whether the given date is disabled according to the `minValue,`maxValue`, and`isDisabled` props.
`isCellUnavailable( (date: CalendarDate )): boolean`	Returns whether the given date is unavailable according to the `isDateUnavailable` prop.
`isPreviousVisibleRangeInvalid(): boolean`	Returns whether the previous visible date range is allowed to be selected according to the `minValue` prop.
`isNextVisibleRangeInvalid(): boolean`	Returns whether the next visible date range is allowed to be selected according to the `maxValue` prop.
`getDatesInWeek( (weekIndex: number, , startDate?: CalendarDate )): Array<CalendarDate \| null>`	Returns an array of dates in the week index counted from the provided start date, or the first visible date if not given. The returned array always has 7 elements, but may include null if the date does not exist according to the calendar system.

Name	Type	Description
`start`	`T`	The start value of the range.
`end`	`T`	The end value of the range.

Name	Type	Description
`calendarProps`	`DOMAttributes`	Props for the calendar grouping element.
`nextButtonProps`	`AriaButtonProps`	Props for the next button.
`prevButtonProps`	`AriaButtonProps`	Props for the previous button.
`errorMessageProps`	`DOMAttributes`	Props for the error message element, if any.
`title`	`string`	A description of the visible date range, for use in the calendar title.

All DOM attributes supported across both HTML and SVG elements.

Extends: AriaAttributes, ReactDOMAttributes

Name	Type	Description
`id`	`string \| undefined`
`role`	`AriaRole \| undefined`
`tabIndex`	`number \| undefined`
`style`	`CSSProperties \| undefined`
`className`	`string \| undefined`

Name	Type	Default	Description
`isDisabled`	`boolean`	—	Whether the button is disabled.
`children`	`ReactNode`	—	The content to display in the button.
`onPress`	`( (e: PressEvent )) => void`	—	Handler that is called when the press is released over the target.
`onPressStart`	`( (e: PressEvent )) => void`	—	Handler that is called when a press interaction starts.
`onPressEnd`	`( (e: PressEvent )) => void`	—	Handler that is called when a press interaction ends, either over the target or when the pointer leaves the target.
`onPressChange`	`( (isPressed: boolean )) => void`	—	Handler that is called when the press state changes.
`onPressUp`	`( (e: PressEvent )) => void`	—	Handler that is called when a press is released over the target, regardless of whether it started on the target or not.
`autoFocus`	`boolean`	—	Whether the element should receive focus on render.
`onFocus`	`( (e: FocusEvent<Target> )) => void`	—	Handler that is called when the element receives focus.
`onBlur`	`( (e: FocusEvent<Target> )) => void`	—	Handler that is called when the element loses focus.
`onFocusChange`	`( (isFocused: boolean )) => void`	—	Handler that is called when the element's focus status changes.
`onKeyDown`	`( (e: KeyboardEvent )) => void`	—	Handler that is called when a key is pressed.
`onKeyUp`	`( (e: KeyboardEvent )) => void`	—	Handler that is called when a key is released.
`href`	`string`	—	A URL to link to if elementType="a".
`target`	`string`	—	The target window for the link.
`rel`	`string`	—	The relationship between the linked resource and the current page. See MDN.
`elementType`	`ElementType \| JSXElementConstructor<any>`	`'button'`	The HTML element or React element used to render the button, e.g. 'div', 'a', or `RouterLink`.
`aria-expanded`	`boolean \| 'true' \| 'false'`	—	Indicates whether the element, or another grouping element it controls, is currently expanded or collapsed.
`aria-haspopup`	`boolean \| 'menu' \| 'listbox' \| 'tree' \| 'grid' \| 'dialog' \| 'true' \| 'false'`	—	Indicates the availability and type of interactive popup element, such as menu or dialog, that can be triggered by an element.
`aria-controls`	`string`	—	Identifies the element (or elements) whose contents or presence are controlled by the current element.
`aria-pressed`	`boolean \| 'true' \| 'false' \| 'mixed'`	—	Indicates the current "pressed" state of toggle buttons.
`type`	`'button' \| 'submit' \| 'reset'`	`'button'`	The behavior of the button when used in an HTML form.
`excludeFromTabOrder`	`boolean`	—	Whether to exclude the element from the sequential tab order. If true, the element will not be focusable via the keyboard by tabbing. This should be avoided except in rare scenarios where an alternative means of accessing the element or its functionality via the keyboard is available.
`id`	`string`	—	The element's unique identifier. See MDN.
`aria-label`	`string`	—	Defines a string value that labels the current element.
`aria-labelledby`	`string`	—	Identifies the element (or elements) that labels the current element.
`aria-describedby`	`string`	—	Identifies the element (or elements) that describes the object.
`aria-details`	`string`	—	Identifies the element (or elements) that provide a detailed, extended description for the object.

Properties

Name	Type	Description
`type`	`'pressstart' \| 'pressend' \| 'pressup' \| 'press'`	The type of press event being fired.
`pointerType`	`PointerType`	The pointer type that triggered the press event.
`target`	`Element`	The target element of the press event.
`shiftKey`	`boolean`	Whether the shift keyboard modifier was held during the press event.
`ctrlKey`	`boolean`	Whether the ctrl keyboard modifier was held during the press event.
`metaKey`	`boolean`	Whether the meta keyboard modifier was held during the press event.
`altKey`	`boolean`	Whether the alt keyboard modifier was held during the press event.

Methods

Method	Description
`continuePropagation(): void`	By default, press events stop propagation to parent elements. In cases where a handler decides not to handle a specific event, it can call `continuePropagation()` to allow a parent to handle it.

'mouse'
  | 'pen'
  | 'touch'
  | 'keyboard'
  | 'virtual'

BaseEvent<ReactKeyboardEvent<any>>

SyntheticEvent & {stopPropagation: () => void,
continuePropagation: () => void
}

Name	Type	Default	Description
`startDate`	`CalendarDate`	—	The first date displayed in the calendar grid. Defaults to the first visible date in the calendar. Override this to display multiple date grids in a calendar.
`endDate`	`CalendarDate`	—	The last date displayed in the calendar grid. Defaults to the last visible date in the calendar. Override this to display multiple date grids in a calendar.
`weekdayStyle`	`'narrow' \| 'short' \| 'long'`	`"narrow"`	The style of weekday names to display in the calendar grid header, e.g. single letter, abbreviation, or full day name.

Properties

Name	Type	Description
`value`	`RangeValue<DateValue>`	The currently selected date range.
`anchorDate`	`CalendarDate \| null`	The current anchor date that the user clicked on to begin range selection.
`highlightedRange`	`RangeValue<CalendarDate>`	The currently highlighted date range.
`isDragging`	`boolean`	Whether the user is currently dragging over the calendar.
`isDisabled`	`boolean`	Whether the calendar is disabled.
`isReadOnly`	`boolean`	Whether the calendar is in a read only state.
`visibleRange`	`RangeValue<CalendarDate>`	The date range that is currently visible in the calendar.
`timeZone`	`string`	The time zone of the dates currently being displayed.
`isValueInvalid`	`boolean`	Whether the calendar is invalid.
`focusedDate`	`CalendarDate`	The currently focused date.
`isFocused`	`boolean`	Whether focus is currently within the calendar.
`minValue`	`DateValue`	The minimum allowed date that a user may select.
`maxValue`	`DateValue`	The maximum allowed date that a user may select.

Methods

Method	Description
`setValue( (value: RangeValue<DateValue> )): void`	Sets the currently selected date range.
`highlightDate( (date: CalendarDate )): void`	Highlights the given date during selection, e.g. by hovering or dragging.
`setAnchorDate( (date: CalendarDate \| \| null )): void`	Sets the anchor date that the user clicked on to begin range selection.
`setDragging( (isDragging: boolean )): void`	Sets whether the user is dragging over the calendar.
`setFocusedDate( (value: CalendarDate )): void`	Sets the focused date.
`focusNextDay(): void`	Moves focus to the next calendar date.
`focusPreviousDay(): void`	Moves focus to the previous calendar date.
`focusNextRow(): void`	Moves focus to the next row of dates, e.g. the next week.
`focusPreviousRow(): void`	Moves focus to the previous row of dates, e.g. the previous work.
`focusNextPage(): void`	Moves focus to the next page of dates, e.g. the next month if one month is visible.
`focusPreviousPage(): void`	Moves focus to the previous page of dates, e.g. the previous month if one month is visible.
`focusSectionStart(): void`	Moves focus to the start of the current section of dates, e.g. the start of the current month.
`focusSectionEnd(): void`	Moves focus to the end of the current section of dates, e.g. the end of the current month month.
`focusNextSection( (larger?: boolean )): void`	Moves focus to the next section of dates based on what is currently displayed. By default, focus is moved by one of the currently displayed unit. For example, if one or more months are displayed, then focus is moved forward by one month. If the `larger` option is `true`, the focus is moved by the next larger unit than the one displayed. For example, if months are displayed, then focus moves to the next year.
`focusPreviousSection( (larger?: boolean )): void`	Moves focus to the previous section of dates based on what is currently displayed. By default, focus is moved by one of the currently displayed unit. For example, if one or more months are displayed, then focus is moved backward by one month. If the `larger` option is `true`, the focus is moved by the next larger unit than the one displayed. For example, if months are displayed, then focus moves to the previous year.
`selectFocusedDate(): void`	Selects the currently focused date.
`selectDate( (date: CalendarDate )): void`	Selects the given date.
`setFocused( (value: boolean )): void`	Sets whether focus is currently within the calendar.
`isInvalid( (date: CalendarDate )): boolean`	Returns whether the given date is invalid according to the `minValue` and `maxValue` props.
`isSelected( (date: CalendarDate )): boolean`	Returns whether the given date is currently selected.
`isCellFocused( (date: CalendarDate )): boolean`	Returns whether the given date is currently focused.
`isCellDisabled( (date: CalendarDate )): boolean`	Returns whether the given date is disabled according to the `minValue,`maxValue`, and`isDisabled` props.
`isCellUnavailable( (date: CalendarDate )): boolean`	Returns whether the given date is unavailable according to the `isDateUnavailable` prop.
`isPreviousVisibleRangeInvalid(): boolean`	Returns whether the previous visible date range is allowed to be selected according to the `minValue` prop.
`isNextVisibleRangeInvalid(): boolean`	Returns whether the next visible date range is allowed to be selected according to the `maxValue` prop.
`getDatesInWeek( (weekIndex: number, , startDate?: CalendarDate )): Array<CalendarDate \| null>`	Returns an array of dates in the week index counted from the provided start date, or the first visible date if not given. The returned array always has 7 elements, but may include null if the date does not exist according to the calendar system.

Name	Type	Description
`gridProps`	`DOMAttributes`	Props for the date grid element (e.g. `<table>`).
`headerProps`	`DOMAttributes`	Props for the grid header element (e.g. `<thead>`).
`weekDays`	`string[]`	A list of week day abbreviations formatted for the current locale, typically used in column headers.

Name	Type	Description
`date`	`CalendarDate`	The date that this cell represents.
`isDisabled`	`boolean`	Whether the cell is disabled. By default, this is determined by the Calendar's `minValue`, `maxValue`, and `isDisabled` props.

Name	Type	Description
`cellProps`	`DOMAttributes`	Props for the grid cell element (e.g. `<td>`).
`buttonProps`	`DOMAttributes`	Props for the button element within the cell.
`isPressed`	`boolean`	Whether the cell is currently being pressed.
`isSelected`	`boolean`	Whether the cell is selected.
`isFocused`	`boolean`	Whether the cell is focused.
`isDisabled`	`boolean`	Whether the cell is disabled, according to the calendar's `minValue`, `maxValue`, and `isDisabled` props. Disabled dates are not focusable, and cannot be selected by the user. They are typically displayed with a dimmed appearance.
`isUnavailable`	`boolean`	Whether the cell is unavailable, according to the calendar's `isDateUnavailable` prop. Unavailable dates remain focusable, but cannot be selected by the user. They should be displayed with a visual affordance to indicate they are unavailable, such as a different color or a strikethrough. Note that because they are focusable, unavailable dates must meet a 4.5:1 color contrast ratio, as defined by WCAG.
`isOutsideVisibleRange`	`boolean`	Whether the cell is outside the visible range of the calendar. For example, dates before the first day of a month in the same week.
`isInvalid`	`boolean`	Whether the cell is part of an invalid selection.
`formattedDate`	`string`	The day number formatted according to the current locale.

Provides state management for a calendar component. A calendar displays one or more date grids and allows users to select a single date.

useCalendarState<T extends DateValue = DateValue>(
  (props: CalendarStateOptions<T>
)): CalendarState

Name	Type	Default	Description
`locale`	`string`	—	The locale to display and edit the value according to.
`createCalendar`	`( (name: string )) => Calendar`	—	A function that creates a Calendar object for a given calendar identifier. Such a function may be imported from the `@internationalized/date` package, or manually implemented to include support for only certain calendars.
`visibleDuration`	`DateDuration`	`{months: 1}`	The amount of days that will be displayed at once. This affects how pagination works.
`selectionAlignment`	`'start' \| 'center' \| 'end'`	—	Determines how to align the initial selection relative to the visible date range.
`minValue`	`DateValue`	—	The minimum allowed date that a user may select.
`maxValue`	`DateValue`	—	The maximum allowed date that a user may select.
`isDateUnavailable`	`( (date: DateValue )) => boolean`	—	Callback that is called for each date of the calendar. If it returns true, then the date is unavailable.
`isDisabled`	`boolean`	`false`	Whether the calendar is disabled.
`isReadOnly`	`boolean`	`false`	Whether the calendar value is immutable.
`autoFocus`	`boolean`	`false`	Whether to automatically focus the calendar when it mounts.
`focusedValue`	`DateValue`	—	Controls the currently focused date within the calendar.
`defaultFocusedValue`	`DateValue`	—	The date that is focused when the calendar first mounts (uncountrolled).
`onFocusChange`	`( (date: CalendarDate )) => void`	—	Handler that is called when the focused date changes.
`isInvalid`	`boolean`	—	Whether the current selection is invalid according to application logic.
`errorMessage`	`ReactNode`	—	An error message to display when the selected value is invalid.
`pageBehavior`	`PageBehavior`	`visible`	Controls the behavior of paging. Pagination either works by advancing the visible page by visibleDuration (default) or one unit of visibleDuration.
`value`	`DateValue \| null`	—	The current value (controlled).
`defaultValue`	`DateValue \| null`	—	The default value (uncontrolled).
`onChange`	`( (value: MappedDateValue<DateValue> )) => void`	—	Handler that is called when the value changes.

The Calendar interface represents a calendar system, including information about how days, months, years, and eras are organized, and methods to perform arithmetic on dates.

Properties

Name	Type	Description
`identifier`	`string`	A string identifier for the calendar, as defined by Unicode CLDR.

Methods

Method	Description
`fromJulianDay( (jd: number )): CalendarDate`	Creates a CalendarDate in this calendar from the given Julian day number.
`toJulianDay( (date: AnyCalendarDate )): number`	Converts a date in this calendar to a Julian day number.
`getDaysInMonth( (date: AnyCalendarDate )): number`	Returns the number of days in the month of the given date.
`getMonthsInYear( (date: AnyCalendarDate )): number`	Returns the number of months in the year of the given date.
`getYearsInEra( (date: AnyCalendarDate )): number`	Returns the number of years in the era of the given date.
`getEras(): string[]`	Returns a list of era identifiers for the calendar.
`getMinimumMonthInYear( (date: AnyCalendarDate )): number`	Returns the minimum month number of the given date's year. Normally, this is 1, but in some calendars such as the Japanese, eras may begin in the middle of a year.
`getMinimumDayInMonth( (date: AnyCalendarDate )): number`	Returns the minimum day number of the given date's month. Normally, this is 1, but in some calendars such as the Japanese, eras may begin in the middle of a month.

Name	Type	Description
`calendar`	`Calendar`
`era`	`string`
`year`	`number`
`month`	`number`
`day`	`number`

Method	Description
`copy(): this`

Represents an amount of time in calendar-specific units, for use when performing arithmetic.

Name	Type	Description
`years`	`number`	The number of years to add or subtract.
`months`	`number`	The number of months to add or subtract.
`weeks`	`number`	The number of weeks to add or subtract.
`days`	`number`	The number of days to add or subtract.

Provides the behavior and accessibility implementation for a calendar component. A calendar displays one or more date grids and allows users to select a single date.

useCalendar<T extends DateValue>(
  (props: AriaCalendarProps<T>,
  , state: CalendarState
)): CalendarAria

Creates a Calendar instance from a Unicode calendar identifier string.

createCalendar(
  (name: string
)): Calendar