Yes, you can do this with the help of Workflows' Update Fields action.
- First, create a custom field called Subscription Date from Settings > Module Management > Module Layouts & Fields.
- Then follow these steps to set up the Update Fields action:
- Select the Contacts module under Basic Information.
- Set the Entry Criteria to Email Opt-in has changed to Double Opt-in.
- Create an Update Fields action to update the Subscription Date to the current date.
So, the day on which the Email Opt-in
field changes to Double Opt-in
is updated in Subscription Date
To learn more about the Update Fields action, click here