local-crontab

local-crontab is a Python wheel and command line 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.
This project is based to local-crontab by UnitedIncome with some bug fixes.

I added the possibility to convert a crontab, in a local timezone, into an UTC crontab, but only for hour and day parts. This feature is useful to automate some simple convertions, but it is necessary a "dst check" program (external) to maintain the sync during the year with original local timezone. This feature in not available to online converter.

Use it online!

Check it out at sonic0.github.io/local-crontab-web-converter

Use as a script

$ local-crontab --help
Usage: command_line.py [OPTIONS] CRONTAB

  Convert a crontab, in a localized timezone, into a set of UTC crontabs.

Options:
  --t, --timezone TZ    The timezone to use. Defaults to system timezone
  --help                Show this help message and exit.
  --version             Show program's version number and exit.

# year 2021
$ local-crontab --timezone America/New_York '0 10 * * *'
0 15 * 1-2 *
0 15 1-13 3 *
0 14 14-31 3 *
0 14 * 4-10 *
0 14 1-6 11 *
0 15 7-30 11 *
0 15 * 12 *

# year 2021
$ local-crontab --timezone America/Denver '0 10 * * *'
0 17 * 1-2 *
0 17 1-13 3 *
0 16 14-31 3 *
0 16 * 4-10 *
0 16 1-6 11 *
0 17 7-30 11 *
0 17 * 12 *

# year 2021, month july
$ local-crontab --timezone America/New_York --shift '0 23 3 * *'
0 3 4 * *

Use as a library

Install with pip install local-crontab:

from local_crontab import Converter
Converter('0 10 * * *', 'America/New_York').to_utc_crons()
# returns
['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 *']                                               

from local_crontab import Converter
Converter('0 23 3 * *', 'America/New_York').to_utc_cron()
# returns
'0 3 4 * *'                                      

Project info

This repo is part of my projects group, called Cron-Converter. Its related repositories:

• cron-converter
• local-crontab-ansible-filter
• local-crontab-serverless-infrastructure
• local-crontab-web-converter