help a mummy here

Hi mummies My son is only 2mths & 14days. During the day,my son will drink formula milk 150ml every 3-4hrs. And he will finish the bottle. However at night he actually sleep the entire night. And only drinks milk once or twice. For example last night, he slept at 1030 - last milk of 100ml and he slept till 3.30am then he awake to drink his milk which he finished the 150ml milk. However he was awake at 6am but he does not want any milk. He just want to cuddle with me and sleep. Is this normal for 2mths baby to sleep through the night and only awakes once for feeding? Thanks in advance!