How old is a baby born in September 2024?

A baby born in September 2024 is currently 2–3 months old (9–13 weeks).

Many of these babies are beginning to exit the newborn phase. Some may have started sleeping through the night.

Although they have passed the two-month milestone, their age is still counted in weeks due to their rapid development. Typically speaking, people will use weeks until the baby is at least 12 weeks old.

They have already grown 1-1.5 inches (2.6–3.9 centimeters) since their birth.