How to autofill the start date?

[Hok Yan Pun]

For certain entries on my Gantt chart, I want them to be a deadline, i.e. without duration. How do I automatically set the start date as the same as the end date?

[John Funk]

Hi @Hok Yan Pun  - Welcome to the Atlassian Community!

You should be able to create an Automation Rule that will copy the End Date to the Start Date when the End Date is updated.

You would start with a Field Value Change trigger based on the End Date field.

Add any conditions and then add a new action for Edit issue.

Select the Start Date field and then the 3 dots to the right of the field.

Select Copy

Click on the words Current Issue

Change Field to copy value from to End Date.

[Dave Rosenlund _Trundl_]

To add @John Funk 's answer, there may be some Gantt-app-specific considerations. 

What Gantt app are you using, @Hok Yan Pun ? 

[Hok Yan Pun]

@Dave Rosenlund _Trundl_ Sorry I'm still figuring out how Jira works and its scope. What I know is that I created a project and probably chose one of the "project management", "task tracking" and "personal task planner" template.

[Hok Yan Pun]

@John Funk Thank you!! It works! I thought I had to write the smart string or something, didn't realise what the copy function does.

[John Funk]

Great! Glad you got it working.