My daughter is having 11/12 hours of sleep at night but then only having a hour nap in the day at like 11/11.30 she then has to stay up for a long period until 6.15ish before going down which I'm worried she will be so overtired soon.
When she was on two naps she was doing bed at 7.30 but that's not possible when she's only having a nap for a hour I don't want to extend the wake window to much