:ITSOK It does sound like he's ready to give up his nap. The time change may have something to do with it as well - it seems to me like these kids can sense the time change and go with it instead of fighting it like us crazy adults.
Give him the option of napping or not - ask him if he wants to lie on the couch at nap time instead of bed - we did that with Mags and it made her naps shorter, so bedtime wasn't as much of a struggle.
It's bittersweet when they give up their naps.
Life is uncertain. Eat dessert first.