....you can enter an event in Calendar and then, when you see the details, click Repeat to choose how often the event will be repeated. "Yearly" is one of the options.
I gave it a try and that works and is an easy option, but doesn't provide the numerical reference 5th, 6th, et cetera. However, for stuff that is simply repeated at regular intervals it's great. For example, I have one of those battery boosters that just hooks up to a car battery rather than the unwieldy linking of two cars via booster cables. The booster requires checking the charge very three months, which needs reminders.....and that just got a lot easier than copy and paste.
