How to recalculate if a due date in a parent task is changed

[Stephan Kress]

Dear Jira community!

In my Jira project, there is a sub-task, which is calculating the due-date due to the due-date in the parent task:

{{issue.dueDate.minusbusinessdays(40)}}

If the date is changing in the parent task, how to get an automated recalculation in the sub-task?

Thanks for your help in advance!

[Bill Sheboy]

Hi @Stephan Kress -- Welcome to the Atlassian Community!

It seems you already have an existing automation rule.  Please post images of that rule and the audit log details showing its execution.  That may provide context for the community to offer suggestions.  Thanks!

Until we see those...

I hypothesize that your current rule is triggered on Create Issue for the sub-tasks.  That is only one of the possible scenarios needed for your use case.  The others include...

1. When the parent's due date changes, branch over the open (i.e., not completed) sub-tasks to edit their due date.  (This is the one you asked about.)
2. When a user directly edits the due date for a sub-task, what do you want to do?
3. And the edge case: when a sub-task's parent changes, update the due date to match the new parent

Please try implementing #1 as described with a branch and if you need help, please post back here so the community can offer ideas.

Kind regards,
Bill