I can confirm this, I used to live in Indonesia, and lived there for 10 years. People are circumcised regardless their religion eventho not all people do that but I believe the majority of people do it.
They have this sort of event, after a kid was circumcised the parents would host a party and invite their relatives and neighbors to come. People come and usually give a certain amount of money or gift to the kid. I remember my childhood friend bought a PS2 from that money LOL.