How old is/was your little one when they started sleeping through the night?

Elizabeth 🌙
I know all babies are different but my son is two months old and there's times he will sleep all through the night without a feeding. Then there's some nights he wakes up at about 4-5am to eat and then goes back to sleep. I'm a first time mom so I'm just curious if that's okay for him. 
-💜