When lo is abit older.
Depends also.
Some babies 3-4 months old can stretch 4-5 hourly.
Some babies 5-6 months old can stretch 4-6 hourly.
Some may have to dream feed cos mommies worry dehydration or due to not putting on weight or auto 3-4 hourly wants milk.
Ideally 6 months n above for sleeping solid 6-7 hours.
You may need to observe also.
Now lo coming to 1 month , need to drink milk every 2-3 hourly. If not will dehydrated, will have issue with poo n urine.
Sheril Isnandar