I would say anywhere from 7:30 to 9:00 is ok. Really the only thing that matters is that your toddler is getting the amount of rest that he/she needs, and that he/she is stay on a routine.

Keeping the bed time the same every night will help your toddler stay in a routine. I wouldn’t do 7:30 one night and then 8:30 the next.

If your toddler is going to bed at random times, but still waking up about the same time in the mornings, that can make for one grouchy child. If yours in anything like Alex, who needs about 11 hours of rest a night, he wakes up about the same time every morning no matter when he goes to sleep.

I would say just to try to develop a good routine that works for your toddler!