Jesus.
Baptism is a Christian concept.
The Baptism of the Lord is celebrated on the feast: the Solemnity of the Epiphany, usually celebrated in the Roman church on 6th of January.
Nothing much happens.
It happens in water.
Baptism is the first sacrament in the bible. With Baptism there is two ways that a person can be baptised it's either a symbolic application of water on the head or immersion of the body into water.
Baptism, Holy Communion and Reconciliation, Confirmation
Confirmation is the second half of baptism, it completes one's initiation into Christianity. It can be celebrated anytime after Baptism, in most of the Rites, it is celebrated immediately with baptism, in the Latin Rite, it has be separated and is usually given after the age of 12, the exact age is up to the local Bishop.
Usually by sprinkling water on the head or by immersion in water.
What baptism are you talking about? Infant baptism? Baptism of believers? Well the answer is much the same. Nothing happens to your sin when you are baptized. If you are a believer your sin is already dealt with before you get baptized. A believers baptism is a sign of the believers identifying with Christ in that Christ was buried and rose again the believer is buried (in water) and rises again to a new life. Infant baptism??? well there is nothing in the Bible that teaches infant baptism.
no
Baptism, Conformation, and death
In a Catholic church baptism is celebrated with the child the parent and the Godparents. The priest pours water to cleanse the sins of the baby and then puts oil on the babies forehead to represent the new life of the baby. it is then follwed by a aprty for the baptism.