Calendars are divided in the following: wall-mounted, desktop and hand-held:

 Wall-mounted quarterly calendars are mainly useful for accountants and other employees of the company that draw up quarterly reports. Such calendar is divided into three quarters in order to make work easy. All three parts are attached with a spring and situated on one base.

Wall-mounted calendars – these are papers of A3 or A2 format attached with a spring. Usually wall-mounted calendars consist of 7 or 14 pages.