Charlie Day is — and has been — many things. But his magnum opus will always be playing the illiterate, hot-tempered, paint-huffing, bird law expert Charlie Kelly on It’s Always Sunny in Philadelphia. And because his 47th birthday is now upon us, today is as good as any to share our favorite moments of him as that infamous version of himself — as well as a few other choice selections from his non-It’s Always Sunny… body of work. Let’s blow out the candles, and roll the tape…