The software utility cron is a time-based job scheduler in Unix-like computer operating systems.
Users that set up and maintain software environments use cron to schedule jobs (commands or shell scripts) to run periodically at fixed times, dates, or intervals. It typically automates system maintenance or administration. This is what internet says about it. This is the shortest version I found - it is more : A cron expression is a string of fields separated by spaces
The task was to set creation of a new issue with reminder every wednesday. Sounds like a simple automation.
The automation has trigger "Schedule" (Executes this rule on the provided schedule.) To set it up correctly We need the CRON expression docs (or at least we should know it...) You can find the CRON expression docs here.
And here is an example code:
0 20 9 ? JAN WED 2019
This literally translates to 0 second, 20 minute, 9 hour, any day of the month, Wednesday, January, 2014.
In plain English, this represents 9:20 AM on every Wednesday during January of 2019. Note, the "?" character means "no particular value".
This is complete chain of strings:
source: here
