It's good that your girl can sleep from 9pm to 9am, that makes it 12 hours per day, hence no need to take afternoon nap. My girl sleeps at 9:30pm, and she will wake up around 7:30 am everyday. She has never been staying in bed later than 8am even on holiday. She is still taking afternoon nap for 2-3 hours everyday routinely at 1:00 pm. That gives us some headache as she will go to PM class this Sep. She may fall asleep when everyone else are excited to start the class !
I plan to let her take an interest class at 9am, hope that will make her feel tired at 10am and sleep for an hour before lunch and school.