The New Wizard Initiation Ceremony is where apprentices become wizards.
Then the apprentice is to enter the New Wizard Initiation Ceremony, which is hosted in the wizards' fortress on Mt. Magic by the President of the Wizards' Guild. It starts with the ceremony of Roll Call.
During the summer solstice before sunset, all the apprentices must be circumcised. They will instantly grow up as full-fledged (and middle-aged) wizards with all power released. Then they part ways with their mentors forever.
In case of failing to complete the ritual results in the mentor wizard having an eggnancy all over again. What happens to the apprentice is not known.