Unofficial is an annual celebration at University of Illinois. Short for Unofficial St. Patrick's Day, it allows students to celebrate St. Patrick's Day in Champaign-Urbana, even though the University is generally on spring break on March 17th. Celebrations generally involve copious drinking at bars or private residences and start early on the morning of the chosen day. This holiday is not university sanctioned, and is known to cause problems among the student population such as arrest, alcohol poisoning, and vehicle accidents. Unofficial 2013 was on Friday, March 1st.