I created all the necessary steps to have an automated email sent based on a date value.   I've confirmed that emails work and even confirmed that the Automated Action is getting called, but it appears that "Based on Timed Condition" for When to Run doesn't seem to work.    When I change When to Run to "On Update" or "On Create" the action does run correctly.

I have the following setup:

When to Run:  Based on Timed Condition
Filter: [blank]
Trigger Date : Date of Birth
Delay After Trigger Date: -1 Days
Use Calendar: [blank]

Any ideas on where to look to see what's happening?.