What time does your 6/7 year old go to bed and wake up?

My 6 year old has been getting up earlier and earlier recently but today at 4:30 was my limit. He usually gets into bed at 7 and we read a book then sleeping time. It seems like it is time to push his bedtime back but I’m not sure what a good time is? The time change also played a role as this started around then, but has not corrected like before. Thank you!