Hello, I was thinking your pm a time may be a tad long & he may be just a little ot? Your am is 5 hrs & your pm is 6 hrs long, so that may be the difference in why he is fighting bedtime & not nap time. I would try to either move his nap 30 min later or move his bedtime a little earlier. Someone correct me if I am wrong, but I think the usual a time is 5-5.5 hrs. It could be the teething or SA too. My lo is teething right now, she goes down fine for her nap, but is fighting bedtime too. GL w/ the new baby!