Baptismal Preparation Class It is required that all first-time parents attend a Baptismal Preparation class prior to the Baptism of their first child. While parents are welcome to attend a class anywhere in the Diocese, the Cathedral offers these classes 4-5 times a year. Please see the Google calendar below for upcoming dates. To register for the class, please email stjohns@diocseofcleveland.org or call 216-771-6666 ext 4700.