The big one
Today's Vappu, Beltane, Labor Day (in the rest of the world at least), and my 50th birthday. I spent it doing neuroanatomy. I can't think of any way to go into my next half-century that I'd prefer.
It is, however, gratifying to see the looks on people's faces who didn't know exactly how old I was. I always say, if I can't be young, immature's the next best thing, and it seems to be working so far!