a wake up time of 6 a.m or later is considered reasonable for babies. if your little one is waking up earlier than 6 a.m and quickly becomes tired and cranky, then you should adjust your schedule.
there may be a number of scheduling problems that have led to your baby up waking early, such as not getting enough nap time or bedtime may be too early or too late.
treat your baby’s early morning wake-ups as night time wake ups. for instance, your baby wakes up at 5 a.m., settle him by offering reassuring kisses and pats, and say “it’s sleepy time, see you in the morning” and leave the room. 