Dev tools · alternatives · 2026

24 alternatives to Day.js 1.6 locale and plugins 2kb moment.js alternative with same API

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

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Day.js 1.6 locale and plugins 2kb moment.js alternative with same API launched in 2018; newer entries below may have overtaken it.

1. 1
   Fast 2kB date library alternative to Moment.js with the same API▲122

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

   2018 · github.com · its alternatives →

2. 2
   Day.js▲10

   2KB immutable date time library alternative to Moment

   2018 · github.com · its alternatives →

3. 3
   Moment.js▲279

   Parse, validate, manipulate, and display dates in JavaScript

   2015 · momentjs.com · its alternatives →

4. 4TJ
   Tzintl.js – International Date-Time Conversion▲56

   TZIntl.js is a light-weight international date-time conversion library.

   2021 · masswerk.at · its alternatives →

5. 5AD
   A date range picker for Twitter Bootstrap▲363

   2012 · dangrossman.info · its alternatives →

6. 6
   Booking.js by Timekit▲535

   Make a beautiful embeddable booking widget in minutes.

   2015 · timekit.io · its alternatives →

7. 7
   Fast.js – faster reimplementations of native JavaScript functions▲323

   Faster user-land reimplementations for several common builtin native JavaScript functions. - codemix/fast.js

   2014 · github.com · its alternatives →

8. 8
   Summarize your time availability in seconds▲109

   Simple tool to share your availability as plain text. Select time slots, convert timezones, copy and send. No calendar links needed.

   2020 · whattime.today · its alternatives →

9. 9
   dateDropper Javascript▲156

   The lightest and the most complete javascript date picker

   2021 · felixg.io · its alternatives →

10. 10
    Elsa – A QuickJS wrapper written in Go▲126

    ❄️ Elsa is a minimal runtime for JavaScript and TypeScript written in Go - elsaland/elsa

    2020 · github.com · its alternatives →

11. 11
    Just right and light-weight date time library for JavaScript▲5

    Light-weight, type-safe, immutable and chainable without dependencies. Handles UTC (default) and the local time of the environment, ambiguous daylight saving time strictly.

    2025 · github.com · its alternatives →

12. 12
    Instadate – A minimal high performance JavaScript date library▲7

    A minimal high performance date library for Node.js and Browser - Teamweek/instadate

    2016 · github.com · its alternatives →

13. 13
    Paste A Date▲83

    Quickly convert timestamps into other timezones

    2017 · its alternatives →

14. 14
    moment-emoji, get a emoji for the time of the day▲9

    🕔 library that returns the approximate emoji for the time - oscarmorrison/moment-emoji

    2019 · github.com · its alternatives →

15. 15IC
    I coded my own JSON translation tool to easily localize my side project▲43

    Hi HN, I’m Joan, the developer of Quicklang. I made this app to easily translate and keep in sync all my localization JSON files for my side projects. While searching online for a similar tool, I only found enterprise solutions that do not allow direct editing of JSON files. I used to use ChatGPT to translate the JSON translation file changes before coding Quicklang. However, I realized that ChatGPT only allows you to input short content for translation into another language (even if you provide a .json file), and each time I had to request translations for one language at a time. So, I…

    2024 · quicklang.app · its alternatives →

16. 16
    a18n – Automated I18n JavaScript Solution▲39

    Automated I18n solution for JavaScript/TypeScript/React - FallenMax/a18n

    2020 · github.com · its alternatives →

17. 17
    A clock synchronization library in golang for distributed systems▲26

    Distributed Time Synchronization Service. Contribute to rubrikinc/kronos development by creating an account on GitHub.

    2018 · github.com · its alternatives →

18. 18CA
    Created an app to mix calendar and TODOs in one list▲24

    was using todoist and calendar, constantly switching between them, decided to implement my own spin on it in react native

    2024 · get-today.app · its alternatives →

19. 19
    CoordConversions NPM Module for Map Coordinate Conversions▲8

    I have been working on a project that has multiple repos, all of which have to convert between multiple map coordinate types, so I made an NPM module that allows you to parse and convert between Decimal Degrees, Degrees-Minutes, and Degrees-Minutes-Seconds coordinate types. Niche? Yes. Useful? Also yes (I hope)!

    Oct 2025 · github.com · its alternatives →

20. 20
    TimeLinx▲17

    Syncing Moments Across Timezones

    2025 · top.gg · its alternatives →

21. 21
    i18nmatic — The Fastest Way to i18n▲16

    CLI tool that automates i18n for React & Next.js in minutes

    2025 · github.com · its alternatives →

22. 22
    A lightweight fullstack boilerplate based on VueJS and Node.js▲24

    A lightweight boilerplate for a universal webapp based on koa, mongodb, node, vue, and webpack - yunhan0/koa-vue-fullstack

    2018 · github.com · its alternatives →

23. 23
    I built an extension of JavaScript in a day▲26

    2014 · github.com · its alternatives →

24. 24
    Tiny Clojure library for formatting dates based on examples▲6

    Date and time formatting for humans. Contribute to zirkonit/dformat development by creating an account on GitHub.

    2015 · github.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →