Fast 2kB alternative to Moment.js with the same modern API

> Day.js is a minimalist JavaScript library that parses, validates, manipulates, and displays dates and times for modern browsers with a largely Moment.js-compatible API. If you use Moment.js, you already know how to use Day.js. ```js dayjs().startOf('month').add(1, 'day').set('year', 2018).format('YYYY-MM-DD HH:mm:ss'); ``` * 🕒 Familiar Moment.js API & patterns * 💪 Immutable * 🔥 Chainable * 🌐 I18n support * 📦 2kb mini library * 👫 All browsers supported --- ## Getting Started ### Documentation You can find more details, API, and other docs on [day.js.org](https://day.js.org/) website. ### Installation ```console npm install dayjs --save ``` 📚[Installation Guide](https://day.js.org/docs/en/installation/installation) ### API It's easy to use Day.js APIs to parse, validate, manipulate, and display dates and times. ```javascript dayjs('2018-08-08') // parse dayjs().format('{YYYY} MM-DDTHH:mm:ss SSS [Z] A') // display dayjs().set('month', 3).month() // get & set dayjs().add(1, 'year') // manipulate dayjs().isBefore(dayjs()) // query ``` 📚[API Reference](https://day.js.org/docs/en/parse/parse) ### I18n Day.js has great support for internationalization. But none of them will be included in your build unless you use it. ```javascript import 'dayjs/locale/es' // load on demand dayjs.locale('es') // use Spanish locale globally dayjs('2018-05-05').locale('zh-cn').format() // use Chinese Simplified locale in a specific instance ``` 📚[Internationalization](https://day.js.org/docs/en/i18n/i18n) ### Plugin A plugin is an independent module that can be added to Day.js to extend functionality or add new features. ```javascript import advancedFormat from 'dayjs/plugin/advancedFormat' // load on demand dayjs.extend(advancedFormat) // use plugin dayjs().format('Q Do k kk X x') // more available formats ``` 📚[Plugin List](https://day.js.org/docs/en/plugin/plugin) ### Usage Trend

## Sponsors Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [[Become a sponsor via Github](https://github.com/sponsors/iamkun/)] [[Become a sponsor via OpenCollective](https://opencollective.com/dayjs#sponsor)]

## Contributors This project exists thanks to all the people who contribute. Please give us a 💖 star 💖 to support us. Thank you. And thank you to all our backers! 🙏

## License Day.js is licensed under a [MIT License](./LICENSE).

	Stars	Issues	Version	Updated	Created
date-fns	33,740	682	3.6.0	2 months ago	10 years ago
dayjs			1.11.11	7 days ago	6 years ago
express	63,848	192	4.19.2	a month ago	13 years ago
luxon	14,890	175	3.4.4	6 months ago	7 years ago
moment	47,800	242	2.30.1	4 months ago	13 years ago

date-fns vs dayjs vs express vs luxon vs moment

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