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dayjs-timezone-iana-plugin

v0.2.0

Published

5 months ago

DayJS timezone plugin alternative to manage DST correctly

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guillaume-carbone

Dayjs-timezone-iana-plugin

DayJS timezone plugin alternative to manage DST correctly, using https://www.iana.org/time-zones

Usage

   npm i dayjs-timezone-iana-plugin

In the code:

   // -> remove dayjs.extend(timezone)
   dayjs.extend(utc)
   dayjs.extend(require('dayjs-timezone-iana-plugin'))

   dayjs('2014-06-01 12:00').tz('America/New_York')
   // You can set a default timezone
   dayjsFactory.tz.setDefault('America/New_York')

Philosophy

The code is quite simple and is largely inspired by moment-timezone.

It includes the latest database IANA 2021e (96KB compressed). It takes more space than the method used by DayJS or Luxon. But it works even if NodeJS is compiled with small-icu.

How to update IANA DB

go to https://github.com/moment/moment-timezone/tree/develop/data/unpacked
download latest.json https://github.com/moment/moment-timezone/blob/develop/data/unpacked/latest.json
execute npm run optimize
commit, push

Todo

[ ] Add lot of tests (see moment-timezone tests)

Changelog

0.2.0

Update iana timezone db (2025)

0.1.0

First version

Maintained by https://carbone.io/ and https://www.easilys.com/