United Income at Capital One created this project with the intention of it helping us with timezone handling. We no longer use this project and it has not gained wide adoption. As such, we have stopped providing updates to this project and archived it as of June 28th, 2021.
A NodeJS library and utility to convert a crontab in a local timezone into a set of UTC crontabs. It creates multiple UTC crontabs because of Daylight Saving Time.
Check it out at unitedincome.github.io/local-crontab
$ npx local-crontab -h
usage: local-crontab [-h] [-v] [--tz TZ] CRONTAB
Convert local crontabs to UTC crontabs
Positional arguments:
CRONTAB A crontab in local time
Optional arguments:
-h, --help Show this help message and exit.
-v, --version Show program's version number and exit.
--tz TZ The timezone to use. Defaults to system timezone
$ npx local-crontab '0 10 * * *' --tz America/New_York
0 15 * 1-2,12 *
0 15 1-10 3 *
0 14 11-31 3 *
0 14 * 4-10 *
0 14 1-3 11 *
0 15 4-31 11 *
$ npx local-crontab '0 10 * * *' --tz America/Denver
0 17 * 1-2,12 *
0 17 1-10 3 *
0 16 11-31 3 *
0 16 * 4-10 *
0 16 1-3 11 *
0 17 4-31 11 *
Install with npm i local-crontab, then:
> const {localCrontabToUtcCrontabs} = require('local-crontab');
> localCrontabToUtcCrontabs('0 10 * * *', 'America/New_York')
[ '0 15 * 1-2,12 *',
'0 15 1-10 3 *',
'0 14 11-31 3 *',
'0 14 * 4-10 *',
'0 14 1-3 11 *',
'0 15 4-31 11 *' ]