useDateFormat

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Last Changed

5 days ago

Get the formatted date according to the string of tokens passed in, inspired by dayjs.

List of all available formats (HH:mm:ss by default)

Format	Output	Description
`Yo`	2018th	Ordinal formatted year
`YY`	18	Two-digit year
`YYYY`	2018	Four-digit year
`M`	1-12	The month, beginning at 1
`Mo`	1st, 2nd, ..., 12th	The month, ordinal formatted
`MM`	01-12	The month, 2-digits
`MMM`	Jan-Dec	The abbreviated month name
`MMMM`	January-December	The full month name
`D`	1-31	The day of the month
`Do`	1st, 2nd, ..., 31st	The day of the month, ordinal formatted
`DD`	01-31	The day of the month, 2-digits
`H`	0-23	The hour
`Ho`	0th, 1st, 2nd, ..., 23rd	The hour, ordinal formatted
`HH`	00-23	The hour, 2-digits
`h`	1-12	The hour, 12-hour clock
`ho`	1st, 2nd, ..., 12th	The hour, 12-hour clock, sorted
`hh`	01-12	The hour, 12-hour clock, 2-digits
`m`	0-59	The minute
`mo`	0th, 1st, ..., 59th	The minute, ordinal formatted
`mm`	00-59	The minute, 2-digits
`s`	0-59	The second
`so`	0th, 1st, ..., 59th	The second, ordinal formatted
`ss`	00-59	The second, 2-digits
`SSS`	000-999	The millisecond, 3-digits
`A`	AM PM	The meridiem
`AA`	A.M. P.M.	The meridiem, periods
`a`	am pm	The meridiem, lowercase
`aa`	a.m. p.m.	The meridiem, lowercase and periods
`d`	0-6	The day of the week, with Sunday as 0
`dd`	S-S	The min name of the day of the week
`ddd`	Sun-Sat	The short name of the day of the week
`dddd`	Sunday-Saturday	The name of the day of the week
`z`	GMT, GMT+1	The timezone with offset
`zz`	GMT, GMT+1	The timezone with offset
`zzz`	GMT, GMT+1	The timezone with offset
`zzzz`	GMT, GMT+01:00	The long timezone with offset

Meridiem is customizable by defining customMeridiem in options.

Demo

source

Monday 2025-03-10 03:47:06

Formatter Editor

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Usage

Basic

vue

<script setup lang="ts">
import { useDateFormat, useNow } from '@vueuse/core'

const formatted = useDateFormat(useNow(), 'YYYY-MM-DD HH:mm:ss')
</script>

<template>
  <div>{{ formatted }}</div>
</template>

Use with locales

vue

<script setup lang="ts">
import { useDateFormat, useNow } from '@vueuse/core'

const formatted = useDateFormat(useNow(), 'YYYY-MM-DD (ddd)', { locales: 'en-US' })
</script>

<template>
  <div>{{ formatted }}</div>
</template>

Use with custom meridiem

vue

<script setup lang="ts">
import { useDateFormat } from '@vueuse/core'

function customMeridiem(hours: number, minutes: number, isLowercase?: boolean, hasPeriod?: boolean) {
  const m = hours > 11 ? (isLowercase ? 'μμ' : 'ΜΜ') : (isLowercase ? 'πμ' : 'ΠΜ')
  return hasPeriod ? m.split('').reduce((acc, current) => acc += `${current}.`, '') : m
}

const am = useDateFormat('2022-01-01 05:05:05', 'hh:mm:ss A', { customMeridiem })
// am.value = '05:05:05 ΠΜ'
const pm = useDateFormat('2022-01-01 17:05:05', 'hh:mm:ss AA', { customMeridiem })
// pm.value = '05:05:05 Μ.Μ.'
</script>

Type Declarations

Show Type Declarations

typescript

export type DateLike = Date | number | string | undefined
export interface UseDateFormatOptions {
  /**
   * The locale(s) to used for dd/ddd/dddd/MMM/MMMM format
   *
   * [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl#locales_argument).
   */
  locales?: MaybeRefOrGetter<Intl.LocalesArgument>
  /**
   * A custom function to re-modify the way to display meridiem
   *
   */
  customMeridiem?: (
    hours: number,
    minutes: number,
    isLowercase?: boolean,
    hasPeriod?: boolean,
  ) => string
}
export declare function formatDate(
  date: Date,
  formatStr: string,
  options?: UseDateFormatOptions,
): string
export declare function normalizeDate(date: DateLike): Date
/**
 * Get the formatted date according to the string of tokens passed in.
 *
 * @see https://vueuse.dev.org.tw/useDateFormat
 * @param date - The date to format, can either be a `Date` object, a timestamp, or a string
 * @param formatStr - The combination of tokens to format the date
 * @param options - UseDateFormatOptions
 */
export declare function useDateFormat(
  date: MaybeRefOrGetter<DateLike>,
  formatStr?: MaybeRefOrGetter<string>,
  options?: UseDateFormatOptions,
): ComputedRef<string>
export type UseDateFormatReturn = ReturnType<typeof useDateFormat>