English | [简体中文](./docs/zh-cn/README.zh-CN.md) | [日本語](./docs/ja/README-ja.md) | [Português Brasileiro](./docs/pt-br/README-pt-br.md) | [한국어](./docs/ko/README-ko.md) | [Español (España)](./docs/es-es/README-es-es.md) | [Русский](./docs/ru/README-ru.md) | [Türkçe](./docs/tr/README-tr.md) | [සිංහල](./docs/si/README-si.md) | [עברית](./docs/he/README-he.md)
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).