What’s up, Chris!
Please reference our KB article on PRO’s recurring events.
If one of the occurrences happens on Thanksgiving, you could “Breaking Events from Series” (see this section in the above link) and then it would no longer be part of the recurrence series, then you could delete that single instance.
For creating your recurrence series, make sure to reference the “Custom” section of the above link. I believe it’d be doable, even if you have to create 2 separate recurrence series.
Last but not least, we have a pretty great Refund Policy so you can buy one or many of our add-ons and thoroughly test them.
Let me know if you have any follow-up questions.