Enter the time you’d like to wake up in our tool below and, based on 90-minute sleep cycles, we can tell you the best times to go to bed to wake up feeling fresh.

Your child's bed time should also be informed by the time they tend to wake up, or need to wake up for school. So for example, the above chart suggests that children aged five should go to bed ...

Dr. Rebecca Greenberg Carter with the University of Maryland Medical System and Brittany Sheehan, pediatric sleep consultant ...