Brit Milah (Bris)
In Judaism, a baby’s circumcision is much more than surgery. A Jewish baby’s circumcision marks his entrance into the covenant (brit) with God. Brit Milah is a ritual which takes place in the home and obviously only involves baby boys.
Traditionally Brit Milah is carried out on the eight day after birth- i.e. the next time the same day of the week comes round, even if the eighth day were to fall on a Sabbath or Festival, though traditionally the mohel might need to make preparations the day before. If the circumcision has to be delayed, for medical reasons, then it will not take place on a Sabbath or Festival.