In 1966 Cardinal John Cody instituted a Chicago seminary system-wide change abolishing the Thursday day off and Saturday school day, which had for decades separated Chicago seminarians and seminary faculty from participating in Saturday social activities, while Quigley faculty voted to alter their own dress code requiring a cassock, in place of other clerical attire.
In 1966 Cardinal John Cody introduced a change at the Chicago seminary eliminating the Thursday day off and Saturday school day, which had previously kept seminarians and faculty separate from social events on Saturdays. The Quigley faculty also made changes to their dress code, adopting cassocks as a requirement.