Thanks Matt,

This was very informative and answered my question.  I wish there was an easier way.  I was hoping to set up a quick SharePoint calendar and run a Power Automate FLOW every day to send us emails, create tickets for re-occurring events/tasks/reminders, but the workflow that needs to be created is a bit complex.  Logic for every X months, third day of the month, etc.  is possible, but will be time consuming.  I'll have to think about other easier options.