Can I create a rule to automate date shifting of all cards based on change on one card?

[Jill Barton]

I have a board where Card A's due date determines the start date for all other cards on the board.  If the due date of Card A shifts, I'd like to be able to automate the shift of the custom field Start Date on all other cards on the board by the same increment (i.e. Card A due date moves back one month - various other Start dates on all other cards shift by that same one month).

[Daydreamer Mike · Accepted solution]

Yes, you would have to link all the cards to the "Parent card" and then you can use the automation:

When a due date is moved in a card with the blue "Parent" label, for each card linked in the attachments, move the due date by the same amount of time 

[Jill Barton]

Thanks.  Can you tell me how to do that?  How do I link the cards to the parent?

[Daydreamer Mike]

Hi Jill, I will be doing an article later today to show how to create this by automation. Once it is up, I'll share the link with you

[Daydreamer Mike]

https://community.atlassian.com/t5/Trello-articles/Mikes-Trello-Tips-Parent-Child-Card-Linking/ba-p/2418149 

[Jill Barton]

This is great Mike!  Many thanks!