Re: Advice please I'm a gran out of practice with toddlers
A lot depends on when he wakes up, and how much sleep (naps) he gets during the day. 18 months old should get about 14 hours of sleep altogether, more or less. If he wakes up later, let's say he sleeps from 9 to 9 (12 hours), plus 2 hour nap in the day, then he's going to stay up to 9pm. Usually, the change in the sleeping habit is gradual, by waking him up earlier and earlier, to make him tired by 7 or 8pm. Since his time is split between the 2 houses, you and the mother should really discuss his schedule to be on the same page. If his mother let's him to sleep in in the morning, then his late evenings are no surprise.