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dayjs

★ 48,665 Open GitHub ↗

⏰ Day.js 2kB immutable date-time library alternative to Moment.js with the same modern API

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<a href="https://day.js.org/" target="_blank" rel="noopener noreferrer"><img width="550"
 src="https://user-images.githubusercontent.com/17680888/39081119-3057bbe2-456e-11e8-862c-646133ad4b43.png"
 alt="Day.js" /></a>
Fast 2kB alternative to Moment.js with the same modern API

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 <a href="https://saucelabs.com/u/dayjs">
 <img width="750" src="https://user-images.githubusercontent.com/17680888/40040137-8e3323a6-584b-11e8-9dba-bbe577ee8a7b.png" alt="Sauce Test Status">
 </a>

> 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 them.

```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)

## Downloads
![Day.js Chart](https://raw.githubusercontent.com/iamkun/dayjs/dev/docs/assets/download.png)

## 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).

dayjs

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