Can I just let my one month old sleep during the night without waking him up for feeding?

How long is he sleeping at a stretch? How often is he feeding during the day? Are you breastfeeding or formula feeding? The answers to those questions can be a factor.

Generally, if he is putting his weight on well, getting a good number of feedings in during the day, his output with wet and soiled diapers is good, and he is a content baby when awake, let him sleep.

Totally agree with Doula. My son started sleeping through the night (10pm-6am) at three weeks old. My doc said it was fine, but he was formula fed which can hold them over longer than breastmilk.