How you make your 1yo baby get to sleep at daytime and night? And how you make him stay asleep? Thanks in advanced.

We started routine since day 1. So his bedtime has been at 9pm since then. We bathe n gave him milk just before his bedtime n he will slp on his own. Currently 12 Mths n still taking 2naps. Each ard 1 hr. for first nap- we bathe n Give milk. 2nd nap usually he will take it outside on the go. But if he is at home, usually ill sing to him n he will zzz After that