Is it possible to increase a custom field by an increment of 1 on a schedule of every 3 weeks?

[Jacinto, Aemarie]

I am looking to automatically increase the number of a custom field within a Trello Card based on the a schedule of 3 weeks. Would this be possible to automate through Trello?

[Daydreamer Mike]

Hi @Jacinto, Aemarie 

Welcome to the community. 

You could do this with a due date automation command.

If you don't know about automation, please check out these resources:

• https://community.atlassian.com/t5/Trello-articles/Bite-sized-Learning-Trello-Automation/ba-p/2558771 
• https://trello.com/guide/automate-anything 
• https://support.atlassian.com/trello/docs/butler/ 

For the command that will help you, something like below:

First of all have the field you want to increment and set the due date to the date you want it to increment...

Next, create a due date command as above

[George Elizarov]

@Daydreamer Mike Hello, I have a question, is it possible to make a "counter" in a custom field?
What I mean is - a card gets to a list, I have automated the creation of a custom field on this card ("Days on current list": num). And I want to increase the value of this field every day until the card leaves the current list.