<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 <a href="https://bundlephobia.com/package/dayjs"><img src="https://img.shields.io/bundlephobia/minzip/dayjs?style=flat-square&color=%2345cc11" alt="Gzip Size"></a> <a href="https://www.npmjs.com/package/dayjs"><img src="https://img.shields.io/npm/v/dayjs.svg?style=flat-square&colorB=51C838" alt="NPM Version"></a> <a href="https://github.com/iamkun/dayjs/actions/workflows/check.yml"><img src="https://img.shields.io/github/actions/workflow/status/iamkun/dayjs/check.yml?style=flat-square" alt="Build Status"></a> <a href="https://codecov.io/gh/iamkun/dayjs"><img src="https://img.shields.io/codecov/c/github/iamkun/dayjs/master.svg?style=flat-square" alt="Codecov"></a> <a href="https://github.com/iamkun/dayjs/blob/master/LICENSE"><img src="https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square" alt="License"></a> <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.

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 website.

Installation

npm install dayjs --save

📚Installation Guide

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

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

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

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]

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.

Dayjs

Install / Use

README