This collection contains calendars produced by various departments and offices of the University to serve as mementos, record the academic year, or mark anniversaries, such as the sesquicentennial calendar in 1904. Some are calendars made to be displayed on walls; others are weekly appointment books. The calendars contain original artwork (drawings, cartoons) and photographs. Earlier calendar feature photos which originally appeared in the yearbook, the Columbian. Later calendars contain photos of the Morningside Heights campus buildings and students, many of which can be found in the Historical Photograph Collection (including those by Manny Warman, University Photographer) and in the Walter L. Bogert Photograph album.