You are an adult when...

you send Christmas cards. I sent some out this year and I'm really proud of myself. Most of them were for reps, but it's the thought that counts. Anyway, I thought about buying some dorky Christmas stamps, but when I saw these at the post office, I couldn't help myself. They are educational (who knew we had the largest cliff dwelling?) and I think the sub-head, "Land of Superlatives" is hilarious.