Brit Milah - Simchat Bat
"And G-d spoke to Abraham saying: ...This is my covenant which you shall keep between Me and you and thy seed after you -every male child among you shall be circumcised." (Gen. 17:12)
Brit milah, which means "covenant of circumcision," is a Jewish ritual performed on a baby boy eight days after he is born. It involves the removal of the foreskin from the penis by a mohel, who is a person that has been trained to safely perform the procedure. Brit milah is also known by the Yiddish word "bris." It is one of the most well-known Jewish customs and signifies the unique relationship between a Jewish boy and God. Traditionally, a baby boy is named after his bris.
As opposed to a brit, circumcision, of a boy on the eighth day, there are no explicit rituals for a girl. Instead, there are customs for a Simchat Bat, celebration of a birth of a daughter. Naming a baby girl on Shabbat by calling the parents up to the Torah where the child is given her name. A special prayer is also said at this time.