Question: at what time should my 3 month old go to bed?
Answer: [Check out my Ideal Bedtime Guide for all ages on Pinterest!] An ideal bedtime for a 3 month old baby is between 7:30 – 9:30 pm. This is based both on the developing circadian rhythm (or body clock) of a 3 month old and also fits in with the 9 – 11 hours of nighttime sleep needed.