useTimeField

Provides the behavior and accessibility implementation for a time field component. A time field allows users to enter and edit time values using a keyboard. Each part of a time value is displayed in an individually editable segment.

install	`yarn add @react-aria/datepicker`
version	3.0.0-rc.0
usage	`import {useTimeField} from '@react-aria/datepicker'`

View repository

GitHub

View package

NPM

API#

useTimeField<T extends TimeValue>(
  props: AriaTimeFieldProps<T>,
  state: DateFieldState,
  ref: RefObject<HTMLElement>
): DateFieldAria

useDateSegment(
  segment: DateSegment,
  state: DateFieldState,
  ref: RefObject<HTMLElement>
): DateSegmentAria

Features#

A time field can be built using <input type="time">, but this is very limited in functionality, lacking in internationalization capabilities, inconsistent between browsers, and difficult to style. useTimeField helps achieve accessible and international time fields that can be styled as needed.

International – Support for locale-specific formatting, number systems, hour cycles, and right-to-left layout.
Time zone aware – Times can optionally include a time zone. All modifications follow time zone rules such as daylight saving time.
Accessible – Each time unit is displayed as an individually focusable and editable segment, which allows users an easy way to edit times using the keyboard, in any format and locale.
Touch friendly – Time segments are editable using an easy to use numeric keypad, and all interactions are accessible using touch-based screen readers.
Customizable – As with all of React Aria, the DOM structure and styling of all elements can be fully customized.

Anatomy#

A time field consists of a label, and a group of segments representing each unit of a time (e.g. hours, minutes, and seconds). Each segment is individually focusable and editable by the user, by typing or using the arrow keys to increment and decrement the value. This approach allows values to be formatted and parsed correctly regardless of the locale or time format, and offers an easy and error-free way to edit times using the keyboard.

useTimeField also supports optional description and error message elements, which can be used to provide more context about the field, and any validation messages. These are linked with the input via the aria-describedby attribute.

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

Name	Type	Description
`labelProps`	`HTMLAttributes<HTMLElement>`	Props for the field's visible label element, if any.
`fieldProps`	`HTMLAttributes<HTMLElement>`	Props for the field grouping element.
`descriptionProps`	`HTMLAttributes<HTMLElement>`	Props for the description element, if any.
`errorMessageProps`	`HTMLAttributes<HTMLElement>`	Props for the error message element, if any.

useDateSegment returns props for an individual time segment:

Name	Type	Description
`segmentProps`	`HTMLAttributes<HTMLDivElement>`	Props for the segment element.

Note that most of this anatomy is shared with useDateField, so you can reuse many components between them if you have both.

State is managed by the useTimeFieldState hook from @react-stately/datepicker. The state object should be passed as an option to useTimeField and useDateSegment.

If the time field does not have a visible label, an aria-label or aria-labelledby prop must be passed instead to identify it to assistive technology.

Time values#

Times are represented in many different ways by cultures around the world. This includes differences in hour cycles, time zones, daylight saving time rules, formatting, and much more. When building applications that support users around the world, it is important to handle these aspects correctly for each locale.

useTimeField uses the @internationalized/date library to represent 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.

Example#

import {useTimeFieldState} from '@react-stately/datepicker';
import {useTimeField, useDateSegment} from '@react-aria/datepicker';
import {useLocale} from '@react-aria/i18n';

export function TimeField(props) {
  let {locale} = useLocale();
  let state = useTimeFieldState({
    ...props,
    locale
  });

  let ref = React.useRef();
  let {labelProps, fieldProps} = useTimeField(props, state, ref);

  return (
    <div className="wrapper">
      <span {...labelProps}>{props.label}</span>
      <div {...fieldProps} ref={ref} className="field">
        {state.segments.map((segment, i) =>
          <DateSegment key={i} segment={segment} state={state} />
        )}
        {state.validationState === 'invalid' &&
          <span aria-hidden="true">🚫</span>
        }
      </div>
    </div>
  );
}

// Note: this component is the same as in the useDateField docs.
function DateSegment({segment, state}) {
  let ref = React.useRef();
  let {segmentProps} = useDateSegment(segment, state, ref);

  return (
    <div
      {...segmentProps}
      ref={ref}
      className={`segment ${segment.isPlaceholder ? 'placeholder' : ''}`}>
      {segment.text}
    </div>
  );
}

<TimeField label="Event date" />

import {useTimeFieldState} from '@react-stately/datepicker';
import {
  useDateSegment,
  useTimeField
} from '@react-aria/datepicker';
import {useLocale} from '@react-aria/i18n';

export function TimeField(props) {
  let { locale } = useLocale();
  let state = useTimeFieldState({
    ...props,
    locale
  });

  let ref = React.useRef();
  let { labelProps, fieldProps } = useTimeField(
    props,
    state,
    ref
  );

  return (
    <div className="wrapper">
      <span {...labelProps}>{props.label}</span>
      <div {...fieldProps} ref={ref} className="field">
        {state.segments.map((segment, i) => (
          <DateSegment
            key={i}
            segment={segment}
            state={state}
          />
        ))}
        {state.validationState === 'invalid' &&
          <span aria-hidden="true">🚫</span>}
      </div>
    </div>
  );
}

// Note: this component is the same as in the useDateField docs.
function DateSegment({ segment, state }) {
  let ref = React.useRef();
  let { segmentProps } = useDateSegment(
    segment,
    state,
    ref
  );

  return (
    <div
      {...segmentProps}
      ref={ref}
      className={`segment ${
        segment.isPlaceholder ? 'placeholder' : ''
      }`}
    >
      {segment.text}
    </div>
  );
}

<TimeField label="Event date" />

import {useTimeFieldState} from '@react-stately/datepicker';
import {
  useDateSegment,
  useTimeField
} from '@react-aria/datepicker';
import {useLocale} from '@react-aria/i18n';

export function TimeField(
  props
) {
  let { locale } =
    useLocale();
  let state =
    useTimeFieldState({
      ...props,
      locale
    });

  let ref = React
    .useRef();
  let {
    labelProps,
    fieldProps
  } = useTimeField(
    props,
    state,
    ref
  );

  return (
    <div className="wrapper">
      <span
        {...labelProps}
      >
        {props.label}
      </span>
      <div
        {...fieldProps}
        ref={ref}
        className="field"
      >
        {state.segments
          .map((
            segment,
            i
          ) => (
            <DateSegment
              key={i}
              segment={segment}
              state={state}
            />
          ))}
        {state
              .validationState ===
            'invalid' &&
          (
            <span aria-hidden="true">
              🚫
            </span>
          )}
      </div>
    </div>
  );
}

// Note: this component is the same as in the useDateField docs.
function DateSegment(
  { segment, state }
) {
  let ref = React
    .useRef();
  let { segmentProps } =
    useDateSegment(
      segment,
      state,
      ref
    );

  return (
    <div
      {...segmentProps}
      ref={ref}
      className={`segment ${
        segment
            .isPlaceholder
          ? 'placeholder'
          : ''
      }`}
    >
      {segment.text}
    </div>
  );
}

<TimeField label="Event date" />

Show CSS

.wrapper {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.field {
  display: inline-flex;
  padding: 2px 4px;
  border-radius: 2px;
  border: 1px solid var(--gray);
  background: var(--spectrum-global-color-gray-50);
}

.field:focus-within {
  border-color: var(--blue);
}

.segment {
  padding: 0 2px;
  font-variant-numeric: tabular-nums;
  text-align: end;
}

.segment.placeholder {
  color: var(--react-spectrum-datepicker-placeholder-color);
}

.segment:focus {
  color: white;
  background: var(--blue);
  outline: none;
  border-radius: 2px;
}

.wrapper {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.field {
  display: inline-flex;
  padding: 2px 4px;
  border-radius: 2px;
  border: 1px solid var(--gray);
  background: var(--spectrum-global-color-gray-50);
}

.field:focus-within {
  border-color: var(--blue);
}

.segment {
  padding: 0 2px;
  font-variant-numeric: tabular-nums;
  text-align: end;
}

.segment.placeholder {
  color: var(--react-spectrum-datepicker-placeholder-color);
}

.segment:focus {
  color: white;
  background: var(--blue);
  outline: none;
  border-radius: 2px;
}

.wrapper {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.field {
  display: inline-flex;
  padding: 2px 4px;
  border-radius: 2px;
  border: 1px solid var(--gray);
  background: var(--spectrum-global-color-gray-50);
}

.field:focus-within {
  border-color: var(--blue);
}

.segment {
  padding: 0 2px;
  font-variant-numeric: tabular-nums;
  text-align: end;
}

.segment.placeholder {
  color: var(--react-spectrum-datepicker-placeholder-color);
}

.segment:focus {
  color: white;
  background: var(--blue);
  outline: none;
  border-radius: 2px;
}

Styled examples#

Tailwind CSS

A time field built with Tailwind and React Aria.

Usage#

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

Value#

A TimeField displays a placeholder value by default. An initial, uncontrolled value can be provided to the TimeField using the defaultValue prop. Alternatively, a controlled value can be provided using the value prop.

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

useTimeField only supports selecting times, but values with date components are also accepted. By default, useTimeField will emit Time 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 time and preserving the date components.

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

function Example() {
  let [value, setValue] = React.useState(new Time(11, 45));

  return (
    <>
      <TimeField
        label="Time (uncontrolled)"
        defaultValue={new Time(11, 45)} />
      <TimeField
        label="Time (controlled)"
        value={value}
        onChange={setValue} />
    </>
  );
}

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

function Example() {
  let [value, setValue] = React.useState(new Time(11, 45));

  return (
    <>
      <TimeField
        label="Time (uncontrolled)"
        defaultValue={new Time(11, 45)} />
      <TimeField
        label="Time (controlled)"
        value={value}
        onChange={setValue} />
    </>
  );
}

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

function Example() {
  let [value, setValue] =
    React.useState(
      new Time(11, 45)
    );

  return (
    <>
      <TimeField
        label="Time (uncontrolled)"
        defaultValue={new Time(
          11,
          45
        )}
      />
      <TimeField
        label="Time (controlled)"
        value={value}
        onChange={setValue}
      />
    </>
  );
}

Time values may also be parsed from strings using the parseTime function. This accepts ISO 8601 formatted time strings such as "04:45:23.123". The toString method of a Time object can also be used to convert a time object to a string.

Time zones#

useTimeField is time zone aware when a ZonedDateTime object is provided as the value. In this case, the time zone abbreviation is displayed, and time zone concerns such as daylight saving time are taken into account when the value is manipulated.

In most cases, your data will come from and be sent to a server as an ISO 8601 formatted string. @internationalized/date includes functions for parsing strings in multiple formats into ZonedDateTime objects. Which format you use will depend on what information you need to store.

parseZonedDateTime – This function parses a date with an explicit time zone and optional UTC offset attached (e.g. "2021-11-07T00:45[America/Los_Angeles]" or "2021-11-07T00:45-07:00[America/Los_Angeles]"). This format preserves the maximum amount of information. If the exact local time and time zone that a user selected is important, use this format. Storing the time zone and offset that was selected rather than converting to UTC ensures that the local time is correct regardless of daylight saving rule changes (e.g. if a locale abolishes DST). Examples where this applies include calendar events, reminders, and other times that occur in a particular location.
parseAbsolute – This function parses an absolute date and time that occurs at the same instant at all locations on Earth. It can be represented in UTC (e.g. "2021-11-07T07:45:00Z"), or stored with a particular offset (e.g. "2021-11-07T07:45:00-07:00"). A time zone identifier, e.g. America/Los_Angeles, must be passed, and the result will be converted into that time zone. Absolute times are the best way to represent events that occurred in the past, or future events where an exact time is needed, regardless of time zone.
parseAbsoluteToLocal – This function parses an absolute date and time into the current user's local time zone. It is a shortcut for parseAbsolute, and accepts the same formats.

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

<TimeField
  label="Event time"
  defaultValue={parseZonedDateTime('2022-11-07T00:45[America/Los_Angeles]')}
/>

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

<TimeField
  label="Event time"
  defaultValue={parseZonedDateTime(
    '2022-11-07T00:45[America/Los_Angeles]'
  )}
/>

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

<TimeField
  label="Event time"
  defaultValue={parseZonedDateTime(
    '2022-11-07T00:45[America/Los_Angeles]'
  )}
/>

useTimeField displays times in the time zone included in the ZoneDateTime object. The above example is always displayed in Pacific Standard Time because the America/Los_Angeles time zone identifier is provided. @internationalized/date includes functions for converting dates between time zones, or parsing a date directly into a specific time zone or the user's local time zone, as shown below.

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

<TimeField
  label="Event time"
  defaultValue={parseAbsoluteToLocal('2021-11-07T07:45:00Z')}
/>

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

<TimeField
  label="Event time"
  defaultValue={parseAbsoluteToLocal(
    '2021-11-07T07:45:00Z'
  )}
/>

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

<TimeField
  label="Event time"
  defaultValue={parseAbsoluteToLocal(
    '2021-11-07T07:45:00Z'
  )}
/>

Events#

useTimeField accepts an onChange prop which is triggered whenever the time is edited 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 and local time zone. This is done by converting the date to a native JavaScript Date object to pass to the formatter. useTimeField allows editing the time components while keeping the date fixed.

import {getLocalTimeZone} from '@internationalized/date';
import {useDateFormatter} from '@react-aria/i18n';

function Example() {
  let [date, setDate] = React.useState(
    parseAbsoluteToLocal('2021-04-07T18:45:22Z')
  );
  let formatter = useDateFormatter({ dateStyle: 'long', timeStyle: 'long' });

  return (
    <>
      <TimeField label="Time" value={date} onChange={setDate} />
      <p>
        Selected date and time:{' '}
        {formatter.format(date.toDate(getLocalTimeZone()))}
      </p>
    </>
  );
}

import {getLocalTimeZone} from '@internationalized/date';
import {useDateFormatter} from '@react-aria/i18n';

function Example() {
  let [date, setDate] = React.useState(
    parseAbsoluteToLocal('2021-04-07T18:45:22Z')
  );
  let formatter = useDateFormatter({
    dateStyle: 'long',
    timeStyle: 'long'
  });

  return (
    <>
      <TimeField
        label="Time"
        value={date}
        onChange={setDate}
      />
      <p>
        Selected date and time:{' '}
        {formatter.format(date.toDate(getLocalTimeZone()))}
      </p>
    </>
  );
}

import {getLocalTimeZone} from '@internationalized/date';
import {useDateFormatter} from '@react-aria/i18n';

function Example() {
  let [date, setDate] =
    React.useState(
      parseAbsoluteToLocal(
        '2021-04-07T18:45:22Z'
      )
    );
  let formatter =
    useDateFormatter({
      dateStyle: 'long',
      timeStyle: 'long'
    });

  return (
    <>
      <TimeField
        label="Time"
        value={date}
        onChange={setDate}
      />
      <p>
        Selected date and
        time:{' '}
        {formatter
          .format(
            date.toDate(
              getLocalTimeZone()
            )
          )}
      </p>
    </>
  );
}

Granularity#

The granularity prop allows you to control the smallest unit that is displayed by useTimeField. By default, times are displayed with "minute" granularity. More granular time values can be displayed by setting the granularity prop to "second".

<TimeField
  label="Event time"
  granularity="second"
  defaultValue={parseAbsoluteToLocal('2021-04-07T18:45:22Z')} />

<TimeField
  label="Event time"
  granularity="second"
  defaultValue={parseAbsoluteToLocal(
    '2021-04-07T18:45:22Z'
  )}
/>

<TimeField
  label="Event time"
  granularity="second"
  defaultValue={parseAbsoluteToLocal(
    '2021-04-07T18:45:22Z'
  )}
/>

Minimum and maximum values#

The minValue and maxValue props can also be used to perform builtin validation. This marks the time field as invalid using ARIA if the user enters an invalid time. You should implement a visual indication that the time field is invalid as well.

This example only accepts times between 9 AM and 5 PM.

<TimeField
  label="Meeting time"
  minValue={new Time(9)}
  maxValue={new Time(17)}
  defaultValue={new Time(8)} />

<TimeField
  label="Meeting time"
  minValue={new Time(9)}
  maxValue={new Time(17)}
  defaultValue={new Time(8)} />

<TimeField
  label="Meeting time"
  minValue={new Time(
    9
  )}
  maxValue={new Time(
    17
  )}
  defaultValue={new Time(
    8
  )}
/>

Placeholder value#

When no value is set, a placeholder value is shown. By default, this is midnight. However, this can be overridden by setting the placeholderValue prop to a more appropriate placeholder for your specific usecase.

<TimeField label="Meeting time" placeholderValue={new Time(9)} />

<TimeField
  label="Meeting time"
  placeholderValue={new Time(9)}
/>

<TimeField
  label="Meeting time"
  placeholderValue={new Time(
    9
  )}
/>

Hide time zone#

When a ZonedDateTime object is provided as the value to useTimeField, the time zone abbreviation is displayed by default. However, if this is displayed elsewhere or implicit based on the usecase, it can be hidden using the hideTimeZone option.

<TimeField
  label="Appointment time"
  defaultValue={parseZonedDateTime('2022-11-07T10:45[America/Los_Angeles]')}
  hideTimeZone />

<TimeField
  label="Appointment time"
  defaultValue={parseZonedDateTime(
    '2022-11-07T10:45[America/Los_Angeles]'
  )}
  hideTimeZone
/>

<TimeField
  label="Appointment time"
  defaultValue={parseZonedDateTime(
    '2022-11-07T10:45[America/Los_Angeles]'
  )}
  hideTimeZone
/>

Hour cycle#

By default, useTimeField displays times in either 12 or 24 hour hour format depending on the user's locale. However, this can be overridden using the hourCycle prop if needed for a specific usecase. This example forces useTimeField to use 24-hour time, regardless of the locale.

<TimeField
  label="Appointment time"
  hourCycle={24} />

<TimeField
  label="Appointment time"
  hourCycle={24} />

<TimeField
  label="Appointment time"
  hourCycle={24}
/>

Time
  | CalendarDateTime
  | ZonedDateTime

A Time represents a clock time without any date components.

Properties

Name	Type	Description
`hour`	`number`	The hour, 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( hour: number, minute: number, second: number, millisecond: number ): void`
`copy(): Time`	Returns a copy of this time.
`add( (duration: TimeDuration )): void`	Returns a new `Time` with the given duration added to it.
`subtract( (duration: TimeDuration )): void`	Returns a new `Time` with the given duration subtracted from it.
`set( (fields: TimeFields )): void`	Returns a new `Time` with the given fields set to the provided values. Other fields will be constrained accordingly.
`cycle( field: TimeField, amount: number, options?: CycleTimeOptions ): void`	Returns a new `Time` with the given field adjusted by a specified amount. When the resulting value reaches the limits of the field, it wraps around.
`toString(): void`	Converts the time to an ISO 8601 formatted string.
`compare( (b: AnyTime )): void`	Compares this time with another. A negative result indicates that this time is before the given one, and a positive time indicates that it is after.

Represents an amount of time, for use whe performing arithmetic.

Name	Type	Description
`hours`	`number`	The number of hours to add or subtract.
`minutes`	`number`	The number of minutes to add or subtract.
`seconds`	`number`	The number of seconds to add or subtract.
`milliseconds`	`number`	The number of milliseconds to add or subtract.

Name	Type	Description
`hour`	`number`
`minute`	`number`
`second`	`number`
`millisecond`	`number`

'hour'
  | 'minute'
  | 'second'
  | 'millisecond'

Name	Type	Default	Description
`hourCycle`	`12 \| 24`	`24`	Whether to use 12 or 24 hour time. If 12 hour time is chosen, the resulting value will remain in the same day period as the original value (e.g. if the value is AM, the resulting value also be AM).
`round`	`boolean`	—	Whether to round the field value to the nearest interval of the amount.

Name	Type	Description
`hour`	`number`
`minute`	`number`
`second`	`number`
`millisecond`	`number`

Method	Description
`copy():`

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.

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():`

Represents an amount of time with both date and time components, 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.
`hours`	`number`	The number of hours to add or subtract.
`minutes`	`number`	The number of minutes to add or subtract.
`seconds`	`number`	The number of seconds to add or subtract.
`milliseconds`	`number`	The number of milliseconds to add or subtract.

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

'era'
  | 'year'
  | 'month'
  | 'day'

'compatible'
  | 'earlier'
  | 'later'
  | 'reject'

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.

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.

Name	Type	Description
`round`	`boolean`	Whether to round the field value to the nearest interval of the amount.

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 seconds.

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
`hourCycle`	`12 \| 24`	—	Whether to display the time in 12 or 24 hour format. By default, this is determined by the user's locale.
`granularity`	`'hour' \| 'minute' \| 'second' \| 'millisecond'`	`'minute'`	Determines the smallest unit that is displayed in the time picker.
`hideTimeZone`	`boolean`	—	Whether to hide the time zone abbreviation.
`placeholderValue`	`TimeValue`	—	A placeholder time to display when no value is selected. Defaults to 12:00 or 00:00 depending on the hour cycle.
`minValue`	`TimeValue`	—	The minimum allowed time that a user may select.
`maxValue`	`TimeValue`	—	The maximum allowed time that a user may select.
`isDisabled`	`boolean`	—	Whether the input is disabled.
`isReadOnly`	`boolean`	—	Whether the input can be selected but not changed by the user.
`validationState`	`ValidationState`	—	Whether the input should display its "valid" or "invalid" visual styling.
`isRequired`	`boolean`	—	Whether user input is required on the input before form submission. Often paired with the `necessityIndicator` prop to add a visual indicator to the input.
`autoFocus`	`boolean`	—	Whether the element should receive focus on render.
`onFocus`	`( (e: FocusEvent )) => void`	—	Handler that is called when the element receives focus.
`onBlur`	`( (e: FocusEvent )) => 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.
`label`	`ReactNode`	—	The content to display as the label.
`description`	`ReactNode`	—	A description for the field. Provides a hint such as specific requirements for what to choose.
`errorMessage`	`ReactNode`	—	An error message for the field.
`value`	`TimeValue`	—	The current value (controlled).
`defaultValue`	`TimeValue`	—	The default value (uncontrolled).
`onChange`	`( (value: MappedTimeValue<TimeValue> )) => void`	—	Handler that is called when the value changes.
`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.
`id`	`string`	—	The element's unique identifier. See MDN.

'valid' | 'invalid'

BaseEvent<ReactKeyboardEvent<any>>

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

TimeValue extends ZonedDateTime ? ZonedDateTime :
TimeValue extends CalendarDateTime ? CalendarDateTime :
TimeValue extends Time ? Time : never

Properties

Name	Type	Description
`value`	`DateValue`	The current field value.
`dateValue`	`Date`	The current value, converted to a native JavaScript `Date` object.
`segments`	`DateSegment[]`	A list of segments for the current value.
`dateFormatter`	`DateFormatter`	A date formatter configured for the current locale and format.
`validationState`	`ValidationState`	The current validation state of the date field, based on the `validationState`, `minValue`, and `maxValue` props.
`granularity`	`Granularity`	The granularity for the field, based on the `granularity` prop and current value.
`maxGranularity`	`'year' \| 'month' \| Granularity`	The maximum date or time unit that is displayed in the field.
`isDisabled`	`boolean`	Whether the field is disabled.
`isReadOnly`	`boolean`	Whether the field is read only.
`isRequired`	`boolean`	Whether the field is required.

Methods

Method	Description
`setValue( (value: DateValue )): void`	Sets the field's value.
`increment( (type: SegmentType )): void`	Increments the given segment. Upon reaching the minimum or maximum value, the value wraps around to the opposite limit.
`decrement( (type: SegmentType )): void`	Decrements the given segment. Upon reaching the minimum or maximum value, the value wraps around to the opposite limit.
`incrementPage( (type: SegmentType )): void`	Increments the given segment by a larger amount, rounding it to the nearest increment. The amount to increment by depends on the field, for example 15 minutes, 7 days, and 5 years. Upon reaching the minimum or maximum value, the value wraps around to the opposite limit.
`decrementPage( (type: SegmentType )): void`	Decrements the given segment by a larger amount, rounding it to the nearest increment. The amount to decrement by depends on the field, for example 15 minutes, 7 days, and 5 years. Upon reaching the minimum or maximum value, the value wraps around to the opposite limit.
`setSegment( (type: SegmentType, , value: number )): void`	Sets the value of the given segment.
`confirmPlaceholder( (type?: SegmentType )): void`	Replaces the value of the date field with the placeholder value. If a segment type is provided, only that segment is confirmed. Otherwise, all segments that have not been entered yet are confirmed.
`clearSegment( (type: SegmentType )): void`	Clears the value of the given segment, reverting it to the placeholder.
`formatValue( (fieldOptions: FieldOptions )): string`	Formats the current date value using the given options.

CalendarDate
  | CalendarDateTime
  | ZonedDateTime

Name	Type	Description
`type`	`SegmentType`	The type of segment.
`text`	`string`	The formatted text for the segment.
`isPlaceholder`	`boolean`	Whether the value is a placeholder.
`isEditable`	`boolean`	Whether the segment is editable.
`value`	`number`	The numeric value for the segment, if applicable.
`minValue`	`number`	The minimum numeric value for the segment, if applicable.
`maxValue`	`number`	The maximum numeric value for the segment, if applicable.

'era'
  | 'year'
  | 'month'
  | 'day'
  | 'hour'
  | 'minute'
  | 'second'
  | 'dayPeriod'
  | 'literal'
  | 'timeZoneName'

A wrapper around Intl.DateTimeFormat that fixes various browser bugs, and polyfills new features.

Method	Description
`constructor( (locale: string, , options: Intl.DateTimeFormatOptions )): void`
`format( (value: Date )): string`	Formats a date as a string according to the locale and format options passed to the constructor.
`formatToParts( (value: Date )): Intl.DateTimeFormatPart[]`	Formats a date to an array of parts such as separators, numbers, punctuation, and more.
`formatRange( (start: Date, , end: Date )): string`	Formats a date range as a string.
`formatRangeToParts( (start: Date, , end: Date )): DateRangeFormatPart[]`	Formats a date range as an array of parts.
`resolvedOptions(): ResolvedDateTimeFormatOptions`	Returns the resolved formatting options based on the values passed to the constructor.

Name	Type	Description
`source`	`'startRange' \| 'endRange' \| 'shared'`

Name	Type	Description
`hourCycle`

'day'
  | 'hour'
  | 'minute'
  | 'second'
  | 'millisecond'

Pick<Intl.DateTimeFormatOptions, 'year'
  | 'month'
  | 'day'
  | 'hour'
  | 'minute'
  | 'second'>

Name	Type	Description
`labelProps`	`HTMLAttributes<HTMLElement>`	Props for the field's visible label element, if any.
`fieldProps`	`HTMLAttributes<HTMLElement>`	Props for the field grouping element.
`descriptionProps`	`HTMLAttributes<HTMLElement>`	Props for the description element, if any.
`errorMessageProps`	`HTMLAttributes<HTMLElement>`	Props for the error message element, if any.

Name	Type	Description
`segmentProps`	`HTMLAttributes<HTMLDivElement>`	Props for the segment element.

Provides state management for a time field component. A time field allows users to enter and edit time values using a keyboard. Each part of a time value is displayed in an individually editable segment.

useTimeFieldState(
  (props: TimeFieldStateOptions
)): DateFieldState

Name	Type	Default	Description
`locale`	`string`	—	The locale to display and edit the value according to.
`hourCycle`	`12 \| 24`	—	Whether to display the time in 12 or 24 hour format. By default, this is determined by the user's locale.
`granularity`	`'hour' \| 'minute' \| 'second' \| 'millisecond'`	`'minute'`	Determines the smallest unit that is displayed in the time picker.
`hideTimeZone`	`boolean`	—	Whether to hide the time zone abbreviation.
`placeholderValue`	`TimeValue`	—	A placeholder time to display when no value is selected. Defaults to 12:00 or 00:00 depending on the hour cycle.
`minValue`	`TimeValue`	—	The minimum allowed time that a user may select.
`maxValue`	`TimeValue`	—	The maximum allowed time that a user may select.
`isDisabled`	`boolean`	—	Whether the input is disabled.
`isReadOnly`	`boolean`	—	Whether the input can be selected but not changed by the user.
`validationState`	`ValidationState`	—	Whether the input should display its "valid" or "invalid" visual styling.
`isRequired`	`boolean`	—	Whether user input is required on the input before form submission. Often paired with the `necessityIndicator` prop to add a visual indicator to the input.
`autoFocus`	`boolean`	—	Whether the element should receive focus on render.
`onFocus`	`( (e: FocusEvent )) => void`	—	Handler that is called when the element receives focus.
`onBlur`	`( (e: FocusEvent )) => 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.
`label`	`ReactNode`	—	The content to display as the label.
`description`	`ReactNode`	—	A description for the field. Provides a hint such as specific requirements for what to choose.
`errorMessage`	`ReactNode`	—	An error message for the field.
`value`	`TimeValue`	—	The current value (controlled).
`defaultValue`	`TimeValue`	—	The default value (uncontrolled).
`onChange`	`( (value: MappedTimeValue<TimeValue> )) => void`	—	Handler that is called when the value changes.

useTimeField<T extends TimeValue>(
  props: AriaTimeFieldProps<T>,
  state: DateFieldState,
  ref: RefObject<HTMLElement>
): DateFieldAria

Parses an ISO 8601 time string.

parseTime(
  (value: string
)): Time

Parses an ISO 8601 date and time string with a time zone extension and optional UTC offset (e.g. "2021-11-07T00:45[America/LosAngeles]" or "2021-11-07T00:45-07:00[America/LosAngeles]"). Ambiguous times due to daylight saving time transitions are resolved according to the disambiguation parameter.

parseZonedDateTime(
  (value: string,
  , disambiguation?: Disambiguation
)): ZonedDateTime

Parses an ISO 8601 date and time string with a UTC offset (e.g. "2021-11-07T07:45:00Z" or "2021-11-07T07:45:00-07:00"). The result is converted to the provided time zone.

parseAbsolute(
  (value: string,
  , timeZone: string
)): ZonedDateTime

Parses an ISO 8601 date and time string with a UTC offset (e.g. "2021-11-07T07:45:00Z" or "2021-11-07T07:45:00-07:00"). The result is converted to the user's local time zone.

parseAbsoluteToLocal(
  (value: string
)): ZonedDateTime