The time a baby starts sleeping through the night is very individual. As parents, the best way for you to promote healthy sleeping habits is to respond to the specific needs of your child.
From approximately the 6th month, children no longer need food at night because at this age the hunger and fullness rhythm of a healthy child will entirely shift to daytime. Short episodes of waking, however, are normal. Ideally, your baby will quickly go back to sleep by him/herself.