To solve problems that when writing a schedule one or two months ahead in a calendar, work with turning cannot be performed as desired, and the schedule written one or two months ago is often cut off, and is not easily confirmed; and to provide a calendar capable of leaving schedules of one year, and capable of being easily maintained.

A connection hole 2 is provided on a printed matter 1 such as the calendar, a picture, a photograph or an illustration, of which both sides or one side is printed, and a connection member 3 is inserted from the back side, and a protrusion protruded to the front side is inserted into the connection hole 2 of the other printed matter 1, so that vertical and horizontal connection can be achieved for the usage. A memorandum and message board 4 such as a white board or a confirmation board 5 on which a telephone number, a size, a cost, a using method, and a precaution statement can be written can be connected to a part of the connected printed matter 1 such as the calendar. The calendar 1 of the month not to be used is connected under the calendar 1 to be used, and the calendar 1 to be used is superposed thereon and is used, and is not a hindrance and is not lost, and is left as a record of one year, and maintenance can be facilitated.