Starting in 1908, an Alumni Day or the mid-winter reunion was held every year on Lincoln's birthday (February 12) because it was the "only business holiday in the year when alumni can visit their Alma Mater." Alumni would come back to campus and could join classes. In 1931, it was called the "annual alumni celebration" but the 1932 program calls it the "25th Columbia Alumni Reunion." This event was held until 1948 when Dean's Day took over.