Email Notification with Workflow for Potential Closing Date

Email Notification with Workflow for Potential Closing Date

Hi All, 

I am trying to create a workflow rule that will send the potential owner an email when their potential record's closing date is the same as today. 

This is my flow: 
@Potentials
When
This rule will be executed on Closing Date at 08:00 AM
Recur: once
Condition 1
Stage IS X,Y,Z,A,B,C
            Instant Actions
            Email Notifications
                 Email Recipients: Potential - Owner
                 Email Template: Custom made one

I created a test potential record with today's closing date (Nov 1. 2019), but I did not get an email notification that the record's closing date was due today. I changed the execution time of When to 30 mins and 1 hr after the time I made the edit (e.g. Edited rule: 10:30 AM; execution time set to: 11:30 AM) and I did not receive an email notification then either. 

Does anyone know what I'm doing wrong?