When I got to the daycare to pick W up tonight, he was still napping. At 5:00 PM. He napped for FOUR HOURS. I'm pretty sure the kid has never taken a four-hour-long nap in his entire life before this. It sounds like he played hard today, though - running with the "big boys" and playing outside for two hours - so I wasn't too concerned about bedtime.
I've changed my mind about that.
I tried to put him down at his normal time. After listening to him cry for 20 minutes, I went up, retrieved his pacifier from behind the crib, and rocked with him for a bit. I put him back down, and he started crying again. That only lasted for about 10 minutes or so, though, and then he was out. For 15 minutes. He just started in again. Hopefully this crying bout doesn't last too long and he actually goes to sleep. I'm not looking forward to this pattern continuing throughout the night, though, as it tends to when he has a rough time going down at night. We'll see what happens.
I know for sure, though, that he will not be taking any more naps of epic lengths at daycare any more. Tomorrow, I'm going to tell them to wake him up after three hours. Max. We can handle the aftermath of a three hour nap, but not a four hour one.