How old do your baby gotta be to stop eating during the night?

After 3 months old: At each check-up, the doctor can confirm the baby is fine. Parents patiently wait 3 months before most babies sleep better at night. Until then, parents switch off at night for one feeding, so the husband can use a bottle for one of the feedings while the wife gets a chance to sleep a 4-hour stretch during the night. After 3 months of age, most babies can sleep about a 6-7 hour stretch at night.