English | 简体中文 | 日本語 | Português Brasileiro | 한국어 | Español (España) | Русский | Türkçe | සිංහල | עברית !Day.js Fast **2kB** alternative to Moment.js with the same modern API !Gzip Size!NPM Version!Build Status!Codecov!License !Sauce Test Status > 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. ``` 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 Permalink: Getting Started ### Documentation Permalink: Documentation You can find more details, API, and other docs on day.js.org website. ### Installation Permalink: Installation ``` npm install dayjs --save ``` 📚 Installation Guide ### API Permalink: API It's easy to use Day.js APIs to parse, validate, manipulate, and display dates and times. ``` 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 ### I18n Permalink: I18n Day.js has great support for internationalization. But none of them will be included in your build unless you use it. ``` 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 ### Plugin Permalink: Plugin A plugin is an independent module that can be added to Day.js to extend functionality or add new features. ``` 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 ### Usage Trend Permalink: Usage Trend [](https://npm-compare.com/moment,dayjs/#timeRange=THREE_YEARS) ## Sponsors Permalink: 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\] \ [Become a sponsor via OpenCollective\] [](https://toyokumo.co.jp/) [](https://github.com/ken-swyfft) [](https://opencollective.com/sight-sound) [](https://www.exoflare.com/open-source/?utm_source=dayjs&utm_campaign=open_source) [](https://chudovo.com/front-end-development/) [](https://github.com/radioplusexperts) [](https://github.com/storyblok) !BestKru [](https://handsontable.com/docs/react-data-grid/?utm_source=Dayjs_GH&utm_medium=sponsorship&utm_campaign=library_sponsorship) !Route Optimizer and Route Planner Software [](https://github.com/Nftsworld007) [](https://github.com/sentdm) ## Contributors Permalink: 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! 🙏 [](https://opencollective.com/dayjs/backer/0/website?requireActive=false)[](https://opencollective.com/dayjs/backer/1/website?requireActive=false)[](https://opencollective.com/dayjs/backer/2/website?requireActive=false)[](https://opencollective.com/dayjs/backer/3/website?requireActive=false) [](https://opencollective.com/dayjs#backers)