Sometimes caregivers falsely believe if they keep their child up later then their child will go to sleep easier. This is not true! More sleep = More Sleep. Less Sleep = Less Sleep. If your child is overtired, it will be harder for them to relax and fall asleep.
Different children act differently when they are overtired. For some children they will be lethargic, spacey, whiny, or crying. Some children become filled with energy when they are overtired. They go into a hyper state of giggly, silly, chaos. Don't mistake this energy-filled state with not being tired. It's likely a result of being overtired.
The best thing to do is prevent your child from becoming overtired. If your child becomes overtired, try to offer a little more flexibility and empathy until they get back to their normal schedule. We recommend offering an extra nap if possible for children under 14 months. If your child is older or you cannot offer an additional nap try, to help them to feel comfortable and not overstimulated until the next sleep time, then consider offering the next sleep time 15-30 minutes earlier than normal.