When your baby reaches 12 months, you might notice them refusing their second nap or waking up unusually early, like 5 am. Before you hit the panic button, take a deep breath and remember that your child is going through significant developmental milestones. They are transitioning into toddlerhood and experiencing daily changes. If you find yourself in a similar situation, don’t worry! There's a lot happening developmentally at this age, and it's completely normal for sleep to become a bit wonky during this period.