Well, I was definitely considering throwing a few ^^^s in the mix, or saying "no more than 10^63 birthdays of equal or lesser happiness" but the sentences started to get too long to be a brief birthday wish.

Also, I figured that after the sun goes out in ~10^9 years, a standard earth day would be pretty meaningless, and so would the passage of "years". But I definitely didn't mean you should have 10^63 happy birthdays and then just keel over, so thanks to KyleRudy, MartinB, and mkehrt for covering for me, and Liron for calling me out.