Dear *insert name here*, I'd like to wish you a very wonderful birthday. May it be one of many greater to come. May all your dreams be merry and bright, and have a very merry birthday tonight. Yours truly, Nights P.S. I ate all your cake. P.P.S. I broke most of your presents. P.P.P.S. I'm pretty sure I got you in a whole lot of trouble. You should really not let strangers come to your birthday party. ~~Here's a very wonderful letter to anyone who has had or will be having a birthday over the course of the next, oh let's say, one hundred years. Hope it/they was/were (a) good one(s). EDIT: You don't know how close I was to putting 'un' in front of birthday. It would have sounded/read so much better.
Yes, happy birthday *insert your name here*. Do you feel *insert your age here* old yet? Must be annoying having to sign *insert your name here* on everything, especially the stars.