Yesterday I found out three of my friends all shared the day as their birthday. My friends Devin, Marie Furie, and Cargo were all born yesterday. (Insert "What was I, born yesterday?" joke here.)
I sent them all this picture, as a text.
This is an old gag of mine. Years ago I found that picture, and while I change the caption a lot, I often send it to friends on their birthdays. I'm pretty sure many of my friends have seen it before, and remember my doing it to them in years past, but they always, always laugh.
I love having a regular schtick for stuff like this. I think the more I use it, the funnier it gets.