Jack is 2 years and 1 month and still naps for 2 -3 hours in the middle of the day. He is definitely mr cranky pants if he misses his nap. But there are some kids who stop needing it earlier. Friends have a DD that dropped day time sleeps at 18 months. I feel sorry for the mum! Both my boys sleep at the same time most days and it's a great chance to get things done (and occassionally to rest myself).

If Louis is still going down easily for his day sleep, I'd keep it up. Maybe he does need a later bedtime? Or maybe you just keep things as they are. I don't really have any advice as I haven't been there. But I hope you find something that works for you all.