Top 7 JavaScript Datetime Projects

dayjs

97 45,745 6.9 JavaScript

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

Project mention: The Day.js Dilemma: How Should We Handle OSS Maintainers Going MIA? | news.ycombinator.com | 2024-04-12

As web developers, we heavily rely OSS packages. One popular example is Day.js, a JS lib for parsing, validating, manipulating, and formatting dates. It's a widely-used alternative to Moment, with over 17mil weekly downloads on npm.
A critical bug was discovered in Day.js (see: https://github.com/iamkun/dayjs/pull/2118) causing incorrect date manipulation (add, subtract) when in UTC TZ. This could have severe implications for any project relying on Day.js for date-related functionality. However, the maintainer of the project appears to be unresponsive, leaving the bug unresolved and the future of the library uncertain.
This raises some important questions for our community:
- At what point should we consider a widely-used OSS project "abandoned" if the maintainer is unresponsive?
- Is forking the project the best solution, or should we first try to reach out to the maintainer through other channels?
- Are there established community guidelines around responsiveness expectations for widely-used OSS projects?
- What are successful examples of community-driven forks or maintenance after a maintainer stepped away?
I am very aware that many of these developers give their spare time for free for these projects, with little or no payment, and I am very thankful for all their work. This developer does get some money (a small amount?) through OpenCollective, and possibly also works for a company (in China?) that makes a UI library, which I think uses Day.js internally.

Luxon

30 14,864 7.6 JavaScript

⏱ A library for working with dates and times in JS

Project mention: A bug which is only a bug five days out of the year | news.ycombinator.com | 2024-01-31

To be honest, use a library where someone else figured out the ambiguities and accounted for the edge cases. Good starting point: https://moment.github.io/luxon/#/math
Date-fns is fine for simpler use cases but Luxon is a lot more complete, especially where it comes to time zones.

SurveyJS

surveyjs.io sponsored

Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
react-date-range

6 2,553 5.6 JavaScript

A React component for choosing dates and date ranges.
laydate

1 1,112 0.0 JavaScript

一款被广泛使用的高级 Web 日历组件，完全开源无偿且颜值与功能兼备，足以应对日期相关的各种业务场景
pg-calendar

1 127 0.0 JavaScript

:calendar: beautiful and eidetic date picker
inquirer-date-prompt

1 19 0.0 JavaScript

A date prompt plugin for Inquirer.js.
myTab

1 12 10.0 JavaScript

myTab is a simple chrome extension that overrides a new chrome tab with beautiful Wallpaper, Weather Information, Date, Time, and a Quote. (by helloukey)
InfluxDB

www.influxdata.com sponsored

Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).