Mine did not nap at that age (at school or at home) so it was a little earlier for my older kids, probably more like 730-8 pm but they got up very early because we had an early start to the day.
My younger ones went around your time but also didn't nap.
I would juggle it a bit. If you find she is having a hard time sleeping at night, you can try a bit earlier or a bit later. Sometimes you need to catch that sweet time - where it's just right.
I was like Gidget. So long as they woke up on their own at right time in morning, I knew they were getting enough sleep. If I had to wake groggy children, and they were grumpy, then they needed more.
Sometimes mine got to read in bed if they didn't just fall asleep quickly. That was always an option (still is) at our house. This time of year it's hard for them to fall asleep some nights - light out.