README
shift-timezone
Shift local date to another timezone
⚠ WARNING: The current implementation has a flaw when using at days where the local date changes to/from daylight saving times.
This package provides timezone conversion of local dates using the IANA time-zones from browser/ OS.
Such there is no need to bundle the IANA time-zones database which keeps this package small sized. Timezone data is only that accurate as your browser/ OS is up-to-date with the latest time-zone updates.
Works in node and modern browsers.
ℹ NOTE: Uses
Date.prototype.toLocaleString()which is a slow function. The shimmed version is ~8x times faster...
For IE10, IE11 a shimmed version using moment-timezone is available. You may use this as well if you like to have control of the timezone data and/or speed matters.
Installation
npm i -S shift-timezone
Usage
Convert a local date to date in different time-zone:
const {timezone} = require('shift-timezone')
const localDate = new Date(2014, 5, 1, 12, 0, 0)
const shiftedDate = timezone(localDate, 'America/New_York')
console.log(shiftedDate.toISOString())
//> '2014-06-01T16:00:00.000Z'
Get time-zone offset to UTC in milliseconds:
const {getTimezoneOffsetMs} = require('shift-timezone')
const localDate = new Date(2014, 5, 1, 12, 0, 0)
const offset = getTimezoneOffsetMs(localDate, 'America/New_York')
//> 14400000
Browser Support
| Browser | Version | Notes |
|---|---|---|
| Chrome | >=45 | ✔ |
| Firefox | >=45 | ✔ |
| Safari | >=10 | ✔ Some timezones are not supported |
| Edge | >=14 | ✔ Some timezones are not supported Do not use before 1992 |
| IE | 10, 11 | ✕ works if used with require('shift-timezone/shim') |
For IE10, IE11 (and also node) you can shim the lib at cost of bundle size:
npm i -S moment moment-timezone
require('shift-timezone/shim') // this plugs in the shim
const {timezone} = require('shift-timezone')
...
License
Unlicense https://unlicense.org