Like Lauren said, you could split the difference and wake him 30 mins different from the usuall time. Going forward should be easier than going backward. It just might mean that he's ready for a nap a little sooner b/c, for example, if you wake him at 7 am after the time change, his body would think it's only 6 am. Babies bounce back from time changes much better than we do. I plan on waking my dd at regular time according to the clock despite the change and putting her down for her nap early if she seems to need to do so.