Scheduling around a day of naps

[mom-in-alberta]

Sometimes, we have to adjust things (even for our own kiddos), so that it is for the good of the group as a whole. My personal opinion is the same as the majority so far. I would start to adjust the nap time to after lunch for the "big nap". The 1 year olds may still need a quick nap in the morning, and I would do that between 9/9:30 and 10/10:30, so that they take the edge off, but can still sleep in the afternoon.
You will probably find pretty quickly that they will start to weed out that nap, anyway. Might as well get everyone on the same general schedule now. It will be much easier, because you won't always be tiptoeing around a napping little one.