To provide a calendar allowing the corner parts of a turned-up calendar paper sheet to be firmly and suitably held in spite of simple constitution.

The calendar 1 is constituted such that the lower side of a mounting paper 2 and the upper sides of a plurality of calendar paper sheets 3 are bound by rings 5 (binding means) and that each calendar paper sheet 3 is changeable into a state of overlapping the front face of the mounting paper 2 from the state of hanging down from the mounting paper 2 through the rings 5 by moving the lower side of each calendar paper sheet 3 to the side above the rings 5. Notches 7, 7 for inserting the corner parts 3a, 3b of the calendar paper sheets 3 are formed near both shoulder sections 2d, 2e of the mounting paper 2, and flaps 10 for reinforcing the mounting paper 2 are formed on the outside of the side edges 7b of the notches 7, 7.