To provide a calendar which is usable while calendars of months desired to be used are arranged side by side, is usable as a white board allowing a user to make a note, a message board and a confirmation board and around which favorite posters etc., can be arranged side by side, and which can be perfectly left behind as a record of one year.

Connection pawls 1 comprising a cut, provided in the upper and lower parts of a printed calendar, a painting, an illustration, a photograph, a note and message board 3, and a confirmation board 2 are vertically connected in such a manner that the connection pawl 1 of the upper part of the calendar is inserted into the connection pawl 1 of the lower part of another calendar and engaged with each other.