Case Day 

An annual holiday celebrated by students at Saint John's University, The College of Saint Benedict, and Gustavus Adolphus College, all private liberal arts schools in Minnesota. Case Day is celebrated by individual students attempting to consume a case of beer in the 24 hour period. Typically celebrated on the Saturday before finals week of the spring semester.

He's got 24 tallies on his arm, so you know he completed case day.

Case Day by Johnnie69 July 20, 2016

Case Day 

A student made “holiday” at the University of Iowa where on the first Saturday of April you must finish an entire case of beer in a 24 hour period.

Hey bro, can you pick us up a few cases of beer for case day?

Case Day by 32spidermonkey April 1, 2022

day case 

a case of beer (usually cheap, due to its teenage nature) purchased with the intention of drinking during the day, rather than at night (can also be used when describing a case drunk with the intention of Pregaming a party that night). very common on school half days leading into the weekend and the summertime binge that teens go through while trying to make up for the time lost in school. Day cases originated in the philadelphia area, particularly the western 'burbs

Friend: "yo we have a half day on friday, i'm feelin' a day case"
Me: "i'm feelin' 3"

Friend: "It's the first week of summer, we gotta set the mood."
Me: "Day cases on day cases on day cases"

day case by license.to.ill January 25, 2012