Hi, Tom —

It is not the norm, but it's perfectly fine to do so and there is no canon forbidding it.

It is typically done at an Easter Vigil but I've seen it done at a regular Sunday Mass; in fact, it's happened twice this year in my parish.

Theoretically, a couple could also choose to get married during a regular Sunday Mass.

John

Tom —

It's at the pastor's discretion. Pastors sometimes do this because there is a lot of catechetical value in exposing the congregation to baptisms; for example there is a beautiful renewal of baptismal vows and renunciation of Satan that the congregation participates in.

I think it is good for the congregation to see a baptism every once in a while, although I wouldn't do it for every baptism, lest the parishioners come to dread them and maybe even avoid Mass.

Eric