you-dont-need/You-Dont-Need-Momentjs

---

you-dont-need/You-Dont-Need-Momentjs.json

{
  "createdAt": "2018-09-08T14:57:38Z",
  "defaultBranch": "master",
  "description": "List of functions which you can use to replace moment.js + ESLint Plugin",
  "fullName": "you-dont-need/You-Dont-Need-Momentjs",
  "homepage": "",
  "language": "JavaScript",
  "name": "You-Dont-Need-Momentjs",
  "pushedAt": "2025-11-18T12:09:34Z",
  "stargazersCount": 13330,
  "topics": [
    "bundle-size",
    "date-fns",
    "esmodules",
    "hacktoberfest",
    "moment-js",
    "pure-function",
    "tree-shaking"
  ],
  "updatedAt": "2025-11-25T16:15:39Z",
  "url": "https://github.com/you-dont-need/You-Dont-Need-Momentjs"
}

You don’t (may not) need Moment.js

Moment.js is a fantastic time & date library with lots of great features and utilities. However, if you are working on a performance sensitive web application, it might cause a huge performance overhead because of its complex APIs and large bundle size.

![Large bundle size]!(./screenshot.png)

Problems with Moment.js:

• It is highly based on OOP APIs, which makes it fail to work with tree-shaking, thus leading to a huge bundle size and performance issues.
• It is mutable and it causes bugs:
  • clone
  • How do I work around mutability in moment.js?
• Complex OOP API (which doubles mutability problem). Here is an example: https://github.com/moment/moment/blob/develop/src/test/moment/add_subtract.js#L244-L286 Moment.js allows to use a.subtract('ms', 50), a.subtract(50, 'ms') and even a.subtract('s', '50').

If you are not using timezone but only a few simple functions from moment.js, this might bloat your app, and therefore is considered overkill. dayjs has a smaller core and has very similar APIs so it makes it very easy to migrate. date-fns enables tree-shaking and other benefits so that it works great with React, Sinon.js, and webpack, etc. See https://github.com/moment/moment/issues/2373 for more ideas on why and how people switch from moment.js to other solutions.

Brief Comparison

Name	Tree-shaking	Methods richness	Pattern	Locale	Timezone Support	Popularity (stars)	Sizes
Moment.js	No	High	OO	123	Good (moment-timezone)
Luxon	No	High	OO	-	Good (Intl)
date-fns	Yes	High	Functional	64	Good (date-fns-tz)
dayjs	No	High	OO	138	Good (Intl)

Voice of Developers

Removed moment.js to replace with date-fns - build output reduced by 40%

—Jared Farago from webnode project.

Good library if you’re looking to replace Moment.js for one reason or another. Immutable too.

—Dan Abramov, Author of Redux and co-author of Create React App. Building tools for humans.

I strongly recommend using date-fns over Moment.js, it’s has a nicer API and you can include only parts you need!

—Matija Marohnić, a design-savvy frontend developer from Croatia.

ESLint Plugin

If you’re using ESLint, you can install a plugin that will help you identify places in your codebase where you don’t (may not) need Moment.js.

Install the plugin…

npm install --save-dev eslint-plugin-you-dont-need-momentjs

…then update your config

"extends" : ["plugin:you-dont-need-momentjs/recommended"],

Quick Links

[Parse]!(#parse)

1. [String + Date Format]!(#string—date-format)
2. [String + Time Format]!(#string—time-format)
3. [String + Format + locale]!(#string—format—locale)

[Get + Set]!(#get—set)

1. [Millisecond/Second/Minute/Hour]!(#millisecond—second—minute—hour)
2. [Date of Month]!(#date-of-month)
3. [Day of Week]!(#day-of-week)
4. [Day of Year]!(#day-of-year)
5. [Week of Year]!(#week-of-year)
6. [Days in Month]!(#days-in-month)
7. [Weeks in Year]!(#weeks-in-year)
8. [Maximum of the given dates]!(#maximum-of-the-given-dates)
9. [Minimum of the given dates]!(#minimum-of-the-given-dates)

[Manipulate]!(#manipulate)

1. [Add]!(#add)
2. [Subtract]!(#subtract)
3. [Start of Time]!(#start-of-time)
4. [End of Time]!(#end-of-time)

[Display]!(#display)

1. [Format]!(#format)
2. [Time from now]!(#time-from-now)
3. [Time from X]!(#time-from-x)
4. [Difference]!(#difference)

[Query]!(#query)

1. [Is Before]!(#is-before)
2. [Is Same]!(#is-same)
3. [Is After]!(#is-after)
4. [Is Between]!(#is-between)
5. [Is Leap Year]!(#is-leap-year)
6. [Is a Date]!(#is-a-date)

Feature Parity

⚠️ Indicates other packages or work are needed. See individual functions [above]!(#quick-links).

	Native	Luxon	date-fns	dayjs	Temporal
Parse
String + Date Format	✅	✅	✅	✅	✅
String + Time Format	✅	✅	✅	⚠️	✅
String + Format + locale	❌	⚠️	✅	⚠️	❌
Get + Set
Millisecond/Second/Minute/Hour	✅	✅	✅	✅	✅
Date of Month	✅	✅	✅	✅	✅
Day of Week	✅	✅	✅	✅	✅
Day of Year	✅	✅	✅	✅	✅
Week of Year	✅	✅	✅	⚠️	✅
Days in Month	✅	✅	✅	✅	✅
Weeks in Year	❌	❌	✅	⚠️	✅
Maximum of the given dates	✅	✅	✅	⚠️	✅
Minimum of the given dates	✅	✅	✅	⚠️	✅
Manipulate
Add	✅	✅	✅	✅	✅
Subtract	✅	✅	✅	✅	✅
Start of Time	❌	✅	✅	✅	✅
End of Time	✅	✅	✅	✅	✅
Display
Format	✅	✅	✅	✅	✅
Time from now	✅	❌	✅	⚠️	✅
Time from X	❌	❌	✅	⚠️	✅
Difference	✅	✅	✅	✅	✅
Query
Is Before	✅	✅	✅	✅	✅
Is Same	✅	✅	✅	✅	✅
Is After	✅	✅	✅	✅	✅
Is Between	❌	✅	✅	⚠️	❌
Is Leap Year	✅	✅	✅	⚠️	✅
Is a Date	✅	✅	✅	✅	✅

Parse

String + Date Format

Return the date parsed from date string using the given format string.

Moment.js

moment('12-25-1995', 'MM-DD-YYYY');
// => "1995-12-24T13:00:00.000Z"

// Native
const datePattern = /^(\d{2})-(\d{2})-(\d{4})$/;
const [, month, day, year] = datePattern.exec('12-25-1995');
new Date(`${month}, ${day} ${year}`);
// => "1995-12-24T13:00:00.000Z"

// date-fns
import parse from 'date-fns/parse';
parse('12-25-1995', 'MM-dd-yyyy', new Date());
// => "1995-12-24T13:00:00.000Z"

// dayjs
dayjs('12-25-1995');
// => "1995-12-24T13:00:00.000Z"

// luxon
DateTime.fromFormat('12-25-1995', 'MM-dd-yyyy').toJSDate();
// => "1995-12-24T13:00:00.000Z"

// Temporal
const datePattern = /^(\d{2})-(\d{2})-(\d{4})$/;
const [, month, day, year] = datePattern.exec('12-25-1995');
new Temporal.ZonedDateTime.from({year, month, day, timeZone: Temporal.Now.timeZone()});
// => "1995-12-24T13:00:00.000Z"

[⬆ back to top]!(#quick-links)

String + Time Format

Return the date parsed from time string using the given format string.

Moment.js

moment('2010-10-20 4:30', 'YYYY-MM-DD HH:mm');
// => "2010-10-19T17:30:00.000Z"

// Native
const datePattern = /^(\d{4})-(\d{2})-(\d{2})\s(\d{1,2}):(\d{2})$/;
const [, year, month, day, rawHour, min] = datePattern.exec('2010-10-20 4:30');
new Date(`${year}-${month}-${day}T${('0' + rawHour).slice(-2)}:${min}:00`);
// => "2010-10-19T17:30:00.000Z"

// date-fns
import parse from 'date-fns/parse';
parse('2010-10-20 4:30', 'yyyy-MM-dd H:mm', new Date());
// => "2010-10-19T17:30:00.000Z"

// dayjs ⚠️ requires customParseFormat plugin
import customParseFormat from 'dayjs/plugin/customParseFormat';
dayjs.extend(customParseFormat);
dayjs('2010-10-20 4:30', 'YYYY-MM-DD HH:mm');
// => "2010-10-19T17:30:00.000Z"

// luxon
DateTime.fromFormat('2010-10-20 4:30', 'yyyy-MM-dd H:mm').toJSDate();
// => "2010-10-19T17:30:00.000Z"

// Temporal
const datePattern = /^(\d{4})-(\d{2})-(\d{2})\s(\d{1,2}):(\d{2})$/;
const [, year, month, day, hour, minute] = datePattern.exec('2010-10-20 4:30');
new Temporal.ZonedDateTime.from({year, month, day, hour, minute, timeZone: Temporal.Now.timeZone()});
// => "2010-10-19T17:30:00.000Z"

[⬆ back to top]!(#quick-links)

String + Format + locale

Return the date parsed from string using the given format string and locale.

Moment.js

moment('2012 mars', 'YYYY MMM', 'fr');
// => "2012-02-29T13:00:00.000Z"

// date-fns
import parse from 'date-fns/parse';
import fr from 'date-fns/locale/fr';
parse('2012 mars', 'yyyy MMMM', new Date(), { locale: fr });
// => "2012-02-29T13:00:00.000Z"

// dayjs ⚠️ requires customParseFormat plugin
import customParseFormat from 'dayjs/plugin/customParseFormat';
import 'dayjs/locale/fr';
dayjs.extend(customParseFormat);
dayjs('2012 mars', 'YYYY MMM', 'fr');
// => "2012-02-29T13:00:00.000Z"

// Luxon ❌ does not support Locale for node unless https://moment.github.io/luxon/docs/manual/install.html#node
DateTime.fromFormat('2012 mars', 'yyyy MMMM', { locale: 'fr' });
// => "2012-02-29T13:00:00.000Z"

[⬆ back to top]!(#quick-links)

Get + Set

Millisecond / Second / Minute / Hour

Get the Millisecond/Second/Minute/Hour of the given date.

Moment.js

moment().seconds();
// => 49
moment().hours();
// => 19

// Native
new Date().getSeconds();
// => 49
new Date().getHours();
// => 19

// date-fns
import getSeconds from 'date-fns/getSeconds';
import getHours from 'date-fns/getHours';
getSeconds(new Date());
// => 49
getHours(new Date());
// => 19

// dayjs
dayjs().second();
// => 49
dayjs().hour();
// => 19

// Luxon
DateTime.local().second;
// => 49
DateTime.local().hour;
// => 19

// Temporal
Temporal.Now.zonedDateTimeISO().second;
// => 49
Temporal.Now.zonedDateTimeISO().hour;
// => 19

Performance tests

Library	Time
Moment	1500.703ms
Native	348.411ms
DateFns	520.670ms
DayJs	494.234ms
Luxon	1208.368ms
Temporal	-

Set the Millisecond/Second/Minute/Hour of the given date.

Moment.js

moment().seconds(30);
// => "2018-09-09T09:12:30.695Z"
moment().hours(13);
// => "2018-09-09T03:12:49.695Z"

// Native
new Date(new Date().setSeconds(30));
// => "2018-09-09T09:12:30.695Z"
new Date(new Date().setHours(13));
// => "2018-09-09T03:12:49.695Z"

// date-fns
import setSeconds from 'date-fns/setSeconds';
import setHours from 'date-fns/setHours';
setSeconds(new Date(), 30);
// => "2018-09-09T09:12:30.695Z"
setHours(new Date(), 13);
// => "2018-09-09T03:12:49.695Z"

// dayjs
dayjs().set('second', 30);
// => "2018-09-09T09:12:30.695Z"
dayjs().set('hour', 13);
// => "2018-09-09T03:12:49.695Z"

// luxon
DateTime.utc()
  .set({ second: 30 })
  .toJSDate();
// => "2018-09-09T09:12:30.695Z"
DateTime.utc()
  .set({ hour: 13 })
  .toJSDate();
// => "2018-09-09T03:12:49.695Z"

// Temporal
Temporal.Now.zonedDateTimeISO().with({ second: 30 });
// => "2018-09-09T09:12:30.695Z"
Temporal.Now.zonedDateTimeISO().with({ hour: 13 });
// => "2018-09-09T03:12:49.695Z"

Performance tests

Library	Time
Moment	1689.744ms
Native	636.741ms
DateFns	714.148ms
DayJs	2037.603ms
Luxon	2897.571ms
Temporal	-

[⬆ back to top]!(#quick-links)

Date of Month

Gets or sets the day of the month.

Moment.js

moment().date();
// => 9
moment().date(4);
// => "2018-09-04T09:12:49.695Z"

// Native
new Date().getDate();
// => 9
new Date().setDate(4);
// => "2018-09-04T09:12:49.695Z"

// date-fns
import getDate from 'date-fns/getDate';
import setDate from 'date-fns/setDate';
getDate(new Date());
// => 9
setDate(new Date(), 4);
// => "2018-09-04T09:12:49.695Z"

// dayjs
dayjs().date();
// => 9
dayjs().set('date', 4);
// => "2018-09-04T09:12:49.695Z"

// luxon
DateTime.utc().day;
// => 9
DateTime.utc()
  .set({ day: 4 })
  .toString();
// => "2018-09-04T09:12:49.695Z"

// Temporal
Temporal.Now.zonedDateTimeISO().day;
// => 9
Temporal.Now.zonedDateTimeISO().with({ day: 4 });
// => "2018-09-04T09:12:49.695Z"

Performance tests

Library	Time
Moment	1381.669ms
Native	397.415ms
DateFns	588.004ms
DayJs	1218.025ms
Luxon	2705.606ms
Temporal	-

[⬆ back to top]!(#quick-links)

Day of Week

Gets or sets the day of the week.

Moment.js

moment().day();
// => 0 (Sunday)
moment().day(-14);
// => "2018-08-26T09:12:49.695Z"

// Native
new Date().getDay();
// => 0 (Sunday)
new Date().setDate(new Date().getDate() - 14);
// => "2018-08-26T09:12:49.695Z"

// date-fns
import getDay from 'date-fns/getDay';
import setDay from 'date-fns/setDay';
getDay(new Date());
// => 0 (Sunday)
setDay(new Date(), -14);
// => "2018-08-26T09:12:49.695Z"

// dayjs
dayjs().day();
// => 0 (Sunday)
dayjs().set('day', -14);
// => "2018-08-26T09:12:49.695Z"

// Luxon
DateTime.local().weekday;
// => 7 (Sunday)
DateTime.local()
  .minus({ day: 14 })
  .toJSDate();
// => "2018-08-26T09:12:49.695Z"

// Temporal
Temporal.Now.zonedDateTimeISO().dayOfWeek;
// => 7 (Sunday)
Temporal.Now.zonedDateTimeISO().subtract(Temporal.Duration.from({ days: 14 }));
// => "2018-09-04T09:12:49.695Z"

Library	Time
Moment	1919.404ms
Native	543.466ms
DateFns	841.436ms
DayJs	1229.475ms
Luxon	3936.282ms
Temporal	-

[⬆ back to top]!(#quick-links)

Day of Year

Gets or sets the day of the year.

Moment.js

moment().dayOfYear();
// => 252
moment().dayOfYear(256);
// => "2018-09-13T09:12:49.695Z"

// Native
Math.floor(
  (new Date() - new Date(new Date().getFullYear(), 0, 0)) / 1000 / 60 / 60 / 24
);
// => 252

// date-fns
import getDayOfYear from 'date-fns/getDayOfYear';
import setDayOfYear from 'date-fns/setDayOfYear';
getDayOfYear(new Date());
// => 252
setDayOfYear(new Date(), 256);
// => "2018-09-13T09:12:49.695Z"

// dayjs ⚠️ requires dayOfYear plugin
import dayOfYear from 'dayjs/plugin/dayOfYear';
dayjs.extend(dayOfYear);
dayjs().dayOfYear();
// => 252
dayjs().dayOfYear(256);
// => "2018-09-13T09:12:49.695Z"

// Luxon
DateTime.local().ordinal;
// => 252
DateTime.local()
  .set({ ordinal: 256 })
  .toString();
// => "2018-09-13T09:12:49.695Z"

// Temporal
Temporal.Now.zonedDateTimeISO().dayOfYear;
// => 252
Temporal.Now.zonedDateTimeISO().with({month: 1, day: 1}).add(Temporal.Duration.from({days: 256}));
// => "2018-09-04T09:12:49.695Z"

Library	Time
Moment	5511.172ms
Native	530.592ms
DateFns	2079.043ms
DayJs	-
Luxon	3540.810ms
Temporal	-

[⬆ back to top]!(#quick-links)

Week of Year

Gets or sets the week of the year.

Moment.js

moment().week();
// => 37
moment().week(24);
// => "2018-06-10T09:12:49.695Z"

// date-fns
import getWeek from 'date-fns/getWeek';
import setWeek from 'date-fns/setWeek';
getWeek(new Date());
// => 37
setWeek(new Date(), 24);
// => "2018-06-10T09:12:49.695Z"

// native getWeek
const day = new Date();
const MILLISECONDS_IN_WEEK = 604800000;
const firstDayOfWeek = 1; // monday as the first day (0 = sunday)
const startOfYear = new Date(day.getFullYear(), 0, 1);
startOfYear.setDate(
  startOfYear.getDate() + (firstDayOfWeek - (startOfYear.getDay() % 7))
);
const dayWeek = Math.round((day - startOfYear) / MILLISECONDS_IN_WEEK) + 1;
// => 37

// native setWeek
const day = new Date();
const week = 24;
const MILLISECONDS_IN_WEEK = 604800000;
const firstDayOfWeek = 1; // monday as the first day (0 = sunday)
const startOfYear = new Date(day.getFullYear(), 0, 1);
startOfYear.setDate(
  startOfYear.getDate() + (firstDayOfWeek - (startOfYear.getDay() % 7))
);
const dayWeek = Math.round((day - startOfYear) / MILLISECONDS_IN_WEEK) + 1;
day.setDate(day.getDate() - (dayWeek - week) * 7);
day.toISOString();
// => "2018-06-10T09:12:49.794Z

// dayjs ⚠️ requires weekOfYear plugin
import weekOfYear from 'dayjs/plugin/weekOfYear';
dayjs.extend(weekOfYear);
dayjs().week();
// => 37
dayjs().week(24);
// => "2018-06-10T09:12:49.695Z"

// Luxon
DateTime.local().weekNumber;
// => 37
DateTime.local()
  .set({ weekNumber: 23 })
  .toString();
// => "2018-06-10T09:12:49.794Z

// Temporal
Temporal.Now.zonedDateTimeISO().weekOfYear;
// => 252
Temporal.Now.zonedDateTimeISO().with({month: 1, day: 1}).add(Temporal.Duration.from({weeks: 23}));
// => "2018-09-04T09:12:49.695Z"

Library	Time
Moment	7147.201ms
Native	1371.631ms
DateFns	5834.815ms
DayJs	-
Luxon	4514.771ms
Temporal	-

[⬆ back to top]!(#quick-links)

Days in Month

Get the number of days in the current month.

Moment.js

moment('2012-02', 'YYYY-MM').daysInMonth();
// => 29

// Native
new Date(2012, 02, 0).getDate();
// => 29

// date-fns
import getDaysInMonth from 'date-fns/getDaysInMonth';
getDaysInMonth(new Date(2012, 1));
// => 29

// dayjs
dayjs('2012-02').daysInMonth();
// => 29

// Luxon
DateTime.local(2012, 2).daysInMonth;
// => 29

// Temporal
(new Temporal.PlainYearMonth(2012, 2)).daysInMonth
// or
Temporal.PlainYearMonth.from('2012-02').daysInMonth
// => 29

Library	Time
Moment	4415.065ms
Native	186.196ms
DateFns	634.084ms
DayJs	1922.774ms
Luxon	1403.032ms
Temporal	-

[⬆ back to top]!(#quick-links)

Weeks in Year

Gets the number of weeks in the current year, according to ISO weeks.

Moment.js

moment().isoWeeksInYear();
// => 52

// Native
const year = new Date().getFullYear();
const MILLISECONDS_IN_WEEK = 604800000;
const firstMondayThisYear = new Date(+year,   0, 5-(new Date(+year,   0, 4).getDay()||7));
const firstMondayNextYear = new Date(+year+1, 0, 5-(new Date(+year+1, 0, 4).getDay()||7));
(firstMondayNextYear - firstMondayThisYear) / MILLISECONDS_IN_WEEK;
// => 52

// date-fns
import getISOWeeksInYear from 'date-fns/getISOWeeksInYear';
getISOWeeksInYear(new Date());
// => 52

// dayjs ⚠️ requires isoWeeksInYear plugin
import isoWeeksInYear from 'dayjs/plugin/isoWeeksInYear';
dayjs.extend(isoWeeksInYear);
dayjs().isoWeeksInYear();
// => 52

// Luxon
DateTime.local().weeksInWeekYear;
// => 52

// Temporal
Temporal.PlainDate.from({day:31, month:12, year: Temporal.Now.plainDateISO()}).weekOfYear
// => 52

Library	Time
Moment	1065.247ms
Native	-
DateFns	4954.042ms
DayJs	-
Luxon	1134.483ms
Temporal	-

[⬆ back to top]!(#quick-links)

Maximum of the given dates

Returns the maximum (most distant future) of the given date.

const array = [
  new Date(2017, 4, 13),
  new Date(2018, 2, 12),
  new Date(2016, 0, 10),
  new Date(2016, 0, 9),
];
// Moment.js
moment.max(array.map(a => moment(a)));
// => "2018-03-11T13:00:00.000Z"

// Native
new Date(Math.max.apply(null, array)).toISOString();
// => "2018-03-11T13:00:00.000Z"

// date-fns
import max from 'date-fns/max';
max(array);
// => "2018-03-11T13:00:00.000Z"

// dayjs ⚠️ requires minMax plugin
import minMax from 'dayjs/plugin/minMax';
dayjs.extend(minMax);
dayjs.max(array.map(a => dayjs(a)));
// => "2018-03-11T13:00:00.000Z"

// Luxon
DateTime.max(...array.map(a => DateTime.fromJSDate(a))).toJSDate();
// => "2018-03-11T13:00:00.000Z"

// Temporal
Temporal.Instant.fromEpochMilliseconds(Math.max.apply(null, array))
// => "2018-03-11T13:00:00.000Z"

Library	Time
Moment	1780.075ms
Native	828.332ms
DateFns	980.938ms
DayJs	-
Luxon	2694.702ms
Temporal	-

[⬆ back to top]!(#quick-links)

Minimum of the given dates

Returns the minimum (most distant future) of the given date.

const array = [
  new Date(2017, 4, 13),
  new Date(2018, 2, 12),
  new Date(2016, 0, 10),
  new Date(2016, 0, 9),
];
// Moment.js
moment.min(array.map(a => moment(a)));
// => "2016-01-08T13:00:00.000Z"

// Native
new Date(Math.min.apply(null, array)).toISOString();
// => "2016-01-08T13:00:00.000Z"

// date-fns
import min from 'date-fns/min';
min(array);
// => "2016-01-08T13:00:00.000Z"

// dayjs ⚠️ requires minMax plugin
import minMax from 'dayjs/plugin/minMax';
dayjs.extend(minMax);
dayjs.min(array.map(a => dayjs(a)));
// => "2016-01-08T13:00:00.000Z"

// Luxon
DateTime.min(...array.map(a => DateTime.fromJSDate(a))).toJSDate();
// => "2016-01-08T13:00:00.000Z"

// Temporal
Temporal.Instant.fromEpochMilliseconds(Math.min.apply(null, array))
// => "2018-03-11T13:00:00.000Z"

Library	Time
Moment	1744.459ms
Native	819.646ms
DateFns	841.249ms
DayJs	-
Luxon	2720.462ms
Temporal	-

[⬆ back to top]!(#quick-links)

Manipulate

Add

Add the specified number of days to the given date.

Moment.js

moment().add(7, 'days');
// => "2018-09-16T09:12:49.695Z"

// Native
const now = new Date();
now.setDate(now.getDate() + 7);
// => "Sun Sep 16 2018 09:12:49"

// date-fns
import addDays from 'date-fns/addDays';
addDays(new Date(), 7);
// => "2018-09-16T09:12:49.695Z"

// dayjs
dayjs().add(7, 'day');
// => "2018-09-16T09:12:49.695Z"

// Luxon
DateTime.local()
  .plus({ day: 7 })
  .toJSDate();
// => "2018-09-16T09:12:49.695Z"

// Temporal
Temporal.Now.zonedDateTimeISO().add(Temporal.Duration.from({days: 7}));
// => "2018-09-16T09:12:49.695Z"

Library	Time
Moment	1309.485ms
Native	259.932ms
DateFns	385.394ms
DayJs	1911.881ms
Luxon	3919.797ms
Temporal	-

[⬆ back to top]!(#quick-links)

Subtract

Subtract the specified number of days from the given date.

Moment.js

moment().subtract(7, 'days');
// => "2018-09-02T09:12:49.695Z"

// Native
const now = new Date();
now.setDate(now.getDate() - 7);
// => Sun Sep 09 2018 09:12:49

// date-fns
import subDays from 'date-fns/subDays';
subDays(new Date(), 7);
// => "2018-09-02T09:12:49.695Z"

// dayjs
dayjs().subtract(7, 'day');
// => "2018-09-02T09:12:49.695Z"

// Luxon
DateTime.local()
  .minus({ day: 7 })
  .toJSDate();
// => "2018-09-02T09:12:49.695Z"

// Temporal
Temporal.Now.zonedDateTimeISO().subtract(Temporal.Duration.from({days: 7}));
// => "2018-09-02T09:12:49.695Z"

Library	Time
Moment	1278.384ms
Native	215.255ms
DateFns	379.057ms
DayJs	1772.593ms
Luxon	4028.866ms
Temporal	-

[⬆ back to top]!(#quick-links)

Start of Time

Return the start of a unit of time for the given date.

Moment.js

moment().startOf('month');
// => "2018-08-31T14:00:00.000Z"

// date-fns
import startOfMonth from 'date-fns/startOfMonth';
startOfMonth(new Date());
// => "2018-08-31T14:00:00.000Z"

// dayjs
dayjs().startOf('month');
// => "2018-08-31T14:00:00.000Z"

// Luxon
DateTime.local().startOf('month');
// => "2018-09-02T09:12:49.695Z"

// Temporal
Temporal.Now.zonedDateTimeISO().with({day: 1});
// => "2018-09-01T14:00:00.000Z"

Library	Time
Moment	1078.948ms
Native	-
DateFns	398.107ms
DayJs	765.358ms
Luxon	2306.765ms
Temporal	-

[⬆ back to top]!(#quick-links)

End of Time

Return the end of a unit of time for the given date.

Moment.js

moment().endOf('day');
// => "2018-09-09T13:59:59.999Z"

// Native
const end = new Date();
end.setHours(23, 59, 59, 999);
end.toISOString();
// => "2018-09-09T16:59:59.999Z"

// date-fns
import endOfDay from 'date-fns/endOfDay';
endOfDay(new Date());
// => "2018-09-09T13:59:59.999Z"

// dayjs
dayjs().endOf('day');
// => "2018-09-09T13:59:59.999Z"

// Luxon
DateTime.local().endOf('day');
// => "2018-09-02T09:12:49.695Z"

// Temporal
Temporal.Now.zonedDateTimeISO().withPlainTime(new Temporal.PlainTime(23,59,59,999,999,999));
// => "2018-09-09T16:59:59.999999999Z"

Library	Time
Moment	1241.304ms
Native	225.519ms
DateFns	319.773ms
DayJs	914.425ms
Luxon	9920.529ms
Temporal	-

[⬆ back to top]!(#quick-links)

Display

Format

Return the formatted date string in the given format.

Moment.js

moment().format('dddd, MMMM Do YYYY, h:mm:ss A');
// => "Sunday, September 9th 2018, 7:12:49 PM"
moment().format('ddd, hA');
// => "Sun, 7PM"

// Native
new Intl.DateTimeFormat('en-US', { dateStyle: 'full', timeStyle: 'medium' }).format(new Date())
// => "Sunday, September 9, 2018 at 7:12:49 PM"
new Intl.DateTimeFormat('en-US', { weekday: 'short', hour: 'numeric' }).format(new Date())
// => "Sun, 7 PM"

// date-fns
import { intlFormat } from 'date-fns'
intlFormat(new Date(), { dateStyle: 'full', timeStyle: 'medium' }, { locale: 'en-US', })
// => "Sunday, September 9, 2018 at 7:12:49 PM"
intlFormat(new Date(), { weekday: 'short', hour: 'numeric' }, { locale: 'en-US', })
// => "Sun, 7 PM"

// dayjs
dayjs().format('dddd, MMMM D YYYY, h:mm:ss A');
// => "Sunday, September 9 2018, 7:12:49 PM"
dayjs().format('ddd, hA');
// => "Sun, 7PM"
// dayjs ⚠️ requires advancedFormat plugin to support more format tokens
import advancedFormat from 'dayjs/plugin/advancedFormat';
dayjs.extend(advancedFormat);
dayjs().format('dddd, MMMM Do YYYY, h:mm:ss A');
// => "Sunday, September 9th 2018, 7:12:49 PM"

// Luxon
DateTime.fromMillis(time).toFormat('EEEE, MMMM dd yyyy, h:mm:ss a');
// => "Sunday, September 9 2018, 7:12:49 PM" ⚠️  not support 9th
DateTime.fromMillis(time).toFormat('EEE, ha');
// => "Sun, 7PM"

// Temporal
new Intl.DateTimeFormat('en-US', { dateStyle: 'full', timeStyle: 'medium' }).format(Temporal.Now.zonedDateTimeISO())
// => "Sunday, September 9, 2018 at 7:12:49 PM"
new Intl.DateTimeFormat('en-US', { weekday: 'short', hour: 'numeric' }).format(Temporal.Now.zonedDateTimeISO())
// => "Sun, 7 PM"

[⬆ back to top]!(#quick-links)

Time from now

Return time from now.

Moment.js

moment(1536484369695).fromNow();
// => "4 days ago"

// Native
new Intl.RelativeTimeFormat().format(-4, 'day');
// => "4 days ago"

// date-fns
import formatDistance from 'date-fns/formatDistance';
formatDistance(new Date(1536484369695), new Date(), { addSuffix: true });
// => "4 days ago"

// dayjs ⚠️ requires relativeTime plugin
import relativeTime from 'dayjs/plugin/relativeTime';
dayjs.extend(relativeTime);

dayjs(1536484369695).fromNow();
// => "5 days ago" ⚠️  the rounding method of this plugin is different from moment.js and date-fns, use with care.

// luxon requires Intl.RelativeTimeFormat
DateTime.local(2022, 1, 27).toRelative({ base: this })
// => "in 4 months"

// Temporal
new Intl.RelativeTimeFormat().format(-4, 'day');
// => "4 days ago"

[⬆ back to top]!(#quick-links)

Time from x

Return time from x.

Moment.js

moment([2007, 0, 27]).to(moment([2007, 0, 29]));
// => "in 2 days"

// date-fns
import formatDistance from 'date-fns/formatDistance';
formatDistance(new Date(2007, 0, 27), new Date(2007, 0, 29));
// => "2 days"

// dayjs ⚠️ requires relativeTime plugin
import relativeTime from 'dayjs/plugin/relativeTime';
dayjs.extend(relativeTime);
dayjs('2007-01-27').to(dayjs('2007-01-29'));
// => "in 2 days"

// luxon ❌ does not support relative time

// Temporal
Temporal.PlainDate.from('2007-01-27').until('2007-01-29');
// => Temporal.Duration('P2D')

[⬆ back to top]!(#quick-links)

Difference

Get the unit of time between the given dates.

Moment.js

moment([2007, 0, 27]).diff(moment([2007, 0, 29]));
// => -172800000
moment([2007, 0, 27]).diff(moment([2007, 0, 29]), 'days');
// => -2

// Native
new Date(2007, 0, 27) - new Date(2007, 0, 29);
// => -172800000
Math.ceil(
  (new Date(2007, 0, 27) - new Date(2007, 0, 29)) / 1000 / 60 / 60 / 24
);
// => -2

// date-fns
import differenceInMilliseconds from 'date-fns/differenceInMilliseconds';
differenceInMilliseconds(new Date(2007, 0, 27), new Date(2007, 0, 29));
// => -172800000
import differenceInDays from 'date-fns/differenceInDays';
differenceInDays(new Date(2007, 0, 27), new Date(2007, 0, 29));
// => -2

// dayjs
dayjs('2007-01-27').diff(dayjs('2007-01-29'), 'milliseconds');
// => -172800000
dayjs('2007-01-27').diff(dayjs('2007-01-29'), 'days');
// => -2

// luxon
DateTime.local(2007, 1, 27).diff(DateTime.local(2007, 1, 29)).milliseconds;
// => -172800000
DateTime.local(2007, 1, 27).diff(DateTime.local(2007, 1, 29), 'days').days;
// => -2

// Temporal
Temporal.PlainDate.from('2007-01-27').since('2007-01-29').total({unit: 'millisecond'});
// => -172800000
Temporal.PlainDate.from('2007-01-27').since('2007-01-29').total({unit: 'day'});
// => -2

[⬆ back to top]!(#quick-links)

Query

Is Before

Check if a date is before another date.

Moment.js

moment('2010-10-20').isBefore('2010-10-21');
// => true

// Native
new Date(2010, 10, 20) < new Date(2010, 10, 21);
// => true

// date-fns
import isBefore from 'date-fns/isBefore';
isBefore(new Date(2010, 9, 20), new Date(2010, 9, 21));
// => true

// dayjs
dayjs('2010-10-20').isBefore('2010-10-21');
// => true

// luxon
DateTime.fromISO('2010-10-20') < DateTime.fromISO('2010-10-21');
// => true

// Temporal
Temporal.PlainDate.compare('2010-10-20', '2010-10-21') === -1;
// => true

[⬆ back to top]!(#quick-links)

Is Same

Check if a date is the same as another date.

Moment.js

moment('2010-10-20').isSame('2010-10-21');
// => false
moment('2010-10-20').isSame('2010-10-20');
// => true
moment('2010-10-20').isSame('2010-10-21', 'month');
// => true

// Native
new Date(2010, 9, 20).valueOf() === new Date(2010, 9, 21).valueOf();
// => false
new Date(2010, 9, 20).valueOf() === new Date(2010, 9, 20).valueOf();
// => true
new Date(2010, 9, 20).getTime() === new Date(2010, 9, 20).getTime();
// => true
new Date(2010, 9, 20).valueOf() === new Date(2010, 9, 20).getTime();
// => true
new Date(2010, 9, 20).toDateString().substring(4, 7) ===
  new Date(2010, 9, 21).toDateString().substring(4, 7);
// => true

// date-fns
import isSameDay from 'date-fns/isSameDay';
import isSameMonth from 'date-fns/isSameMonth';
isSameDay(new Date(2010, 9, 20), new Date(2010, 9, 21));
// => false
isSameDay(new Date(2010, 9, 20), new Date(2010, 9, 20));
// => true
isSameMonth(new Date(2010, 9, 20), new Date(2010, 9, 21));
// => true

// dayjs
dayjs('2010-10-20').isSame('2010-10-21');
// => false
dayjs('2010-10-20').isSame('2010-10-20');
// => true
dayjs('2010-10-20').isSame('2010-10-21', 'month');
// => true

// luxon
(+DateTime.fromISO('2010-10-20') ===
  +DateTime.fromISO('2010-10-21') +
    // => false
    DateTime.fromISO('2010-10-20')) ===
  +DateTime.fromISO('2010-10-20');
// => true
DateTime.fromISO('2010-10-20').hasSame(DateTime.fromISO('2010-10-21'), 'month');
// => true

// Temporal
Temporal.PlainDate.from('2010-10-20').equals('2010-10-21');
// => false
Temporal.PlainDate.from('2010-10-20').equals('2010-10-20');
// => true
Temporal.PlainDate.from('2010-10-20').month === Temporal.PlainDate.from('2010-10-21').month;
// => true

[⬆ back to top]!(#quick-links)

Is After

Check if a date is after another date.

Moment.js

moment('2010-10-20').isAfter('2010-10-19');
// => true

// Native
new Date(2010, 9, 20) > new Date(2010, 9, 19);
// => true

// date-fns
import isAfter from 'date-fns/isAfter';
isAfter(new Date(2010, 9, 20), new Date(2010, 9, 19));
// => true

// dayjs
dayjs('2010-10-20').isAfter('2010-10-19');
// => true

// luxon
DateTime.fromISO('2010-10-20') > DateTime.fromISO('2010-10-19');
// => true

// Temporal
Temporal.PlainDate.compare('2010-10-20', '2010-10-19') === 1;
// => true

[⬆ back to top]!(#quick-links)

Is Between

Check if a date is between two other dates.

Moment.js

moment('2010-10-20').isBetween('2010-10-19', '2010-10-25');
// => true

// date-fns
import isWithinInterval from 'date-fns/isWithinInterval';
isWithinInterval(new Date(2010, 9, 20), {
  start: new Date(2010, 9, 19),
  end: new Date(2010, 9, 25),
});
// => true

// dayjs ⚠️ requires isBetween plugin
import isBetween from 'dayjs/plugin/isBetween';
dayjs.extend(isBetween);
dayjs('2010-10-20').isBetween('2010-10-19', '2010-10-25');
// => true

// luxon
Interval.fromDateTimes(
  DateTime.fromISO('2010-10-19'),
  DateTime.fromISO('2010-10-25')
).contains(DateTime.fromISO('2010-10-20'));
// => true

[⬆ back to top]!(#quick-links)

Is Leap Year

Check if a year is a leap year.

Moment.js

moment([2000]).isLeapYear();
// => true

// Native
new Date(2000, 1, 29).getDate() === 29;
// => true

// date-fns
import isLeapYear from 'date-fns/isLeapYear';
isLeapYear(new Date(2000, 0, 1));
// => true

// dayjs ⚠️ requires isLeapYear plugin
import isLeapYear from 'dayjs/plugin/isLeapYear';
dayjs.extend(isLeapYear);
dayjs('2000-01-01').isLeapYear();
// => true

// luxon
expect(DateTime.local(2000).isInLeapYear).toBeTruthy();
// => true

// Temporal
Temporal.PlainDate.from('2000-01-01').inLeapYear;
// => true

[⬆ back to top]!(#quick-links)

Is a Date

Check if a variable is a native js Date object.

Moment.js

moment.isDate(new Date());
// => true

// Native
new Date() instanceof Date;
// => true

// date-fns
import isDate from 'date-fns/isDate';
isDate(new Date());
// => true

// dayjs
dayjs(new Date()).isValid();

// luxon
DateTime.local().isValid;
// => true

// Temporal
new Date() instanceof Date;
Temporal.Now.plainTimeISO() instanceof Temporal.PlainTime;
Temporal.Now.plainDateISO() instanceof Temporal.PlainDate;
Temporal.Now.plainDateTimeISO() instanceof Temporal.PlainDateTime;
Temporal.Now.zonedDateTimeISO() instanceof Temporal.ZonedDateTime;
// => true

[⬆ back to top]!(#quick-links)

License

MIT