1 months old baby

Question: My son is 18 months old...,he is sleeping late at night around 12 or 1 am ..I wanna change this habit ..pls suggest me some tips..,

2 Answers
Question
Answer: Take him out in the evening, let him play and exert himself so that he can sleep on time. Also in night switch off lights and show him as if all of u r sleeping, slowly his habit will change
Answer: Sab..sahi he