Just wondering if it's possible in CB to create a task that would send a user an automated email once a date field has expired ... as an example:

An instructor signs up and as part of the signup process, has to enter the date when their certification expires. On that day, or a few days before, CB would send an email to the instructor stating that they will need to set up a time for re-certification.

Any help, or an estimate from a developer to set up such a task, would be greatly appreciated!