DD1 who is just over 3 goes to bed around 6pm, occasionally earlier. She doesn't have a daysleep. She is up around 6am, occasionally earlier.

Naps have an unpredictable effect on sleep. Usually if it is in the first half of the day and only short (say in the car on the way home from somewhere) there is no difference. If it is longer and later than she could be up a few hours extra. If she falls asleep, I let her sleep but it is rare that she does these days.