I really felt the transition to Daylight Savings Time this year. Maybe it gets worse as you get older. I saw this cute article about it. A guy bought a dinosaur filled with dinoflagellates (microorganisms, basically) that light up at night. However, the dinosaur came from San Diego, and it needed to adjust to East Coast time. So at first, it didn't light up the way it should. He was drawing an analogy between Daylight Savings Time and jet lag - they both disrupt your circadian rhythms.