Just wondering do babies who have been travelling through different time zones adjust themselves back to normal sleeping patterns.

My wife and son came back from the Phils yesterday morning and he slept all day also from 2pm today and is still in bed.

But the night time he is waking about 11pm ie: 6am Phils time so he is still on their time, would just like to ask advice from those that have been in similar situations and how it worked out cheers guys...