Can a custom date field trigger an action once the date has passed?

[Mike Stevens]

Ahoy all,

We've got a custom date field on our cards called 'Event Date', and I'd like to have it trigger an action such as a comment on the card or a message to Slack, etc. 

The idea is that the moment the date has passed, it triggers an action.

There are a lot of options in the custom fields automations, but none of them stand out to me as the solution for this. I see things like 'completed' and 'checked' and so on, but short of experimenting with them, they don't strike me as the right options for this job. 

I'm sure I'm missing something obvious. 

Any help appreciated! 

[Dreamsuite Mike · Accepted solution]

You can only trigger such command on the due date of the card but you can make it work by doing,

When the "Event Date" custom field is set, set the due date to {customfieldvalue} 

and then by using a due date command:

[Mike Stevens]

Thanks for the answer, fellow Mike! So you're suggesting, I think, that I set a due date 2 days before the date in our 'Event date' custom field, thus triggering an action on the date of the event? A bit cumbersome, but that'd work for sure. I guess it'll have to do, haha. 

Thanks again! 

[Dreamsuite Mike]

It is cumbersome to have 2 stages and a custom field to make this work.  Trello could so easily fix this... However, I'm suggesting that you set the event date to the actual event date, which will in turn set the due date to the same.  Then use the due date automation to triger x number of days before the event date

[Mike Stevens]

Aaah, good point! That'll work fine. Thanks!