The time to wean your baby from night feedings can begin anywhere from 4 to 6 months of age. All babies are different and require different feeding schedules but on average most babies by this age are getting enough calories in the day to hold them over for at least five or six hours. When you decide to start weaning your baby, take it slowly and realise there will be setbacks. Start by reducing milk feeds and instead feed them with solids either before or after a milk feed. Offer your baby extra feedings in the evening before bed time. This should keep baby's tummy fuller during the night.
If you are trying to wean your baby and they cry inconsolably night after night, they just may not be ready. Go back to regular feedings and try again in a few weeks.