Dry Erase Small Wall Calendar. Set up your Month and when complete, erase and start the next Month. By the way, on an average, the calendar will be seen ten times per day in the office; the positioning of a calendar will always be a prime spot, 80% chance of reorder and (average order) repeats 8 years!! Last but not least, think of your cost per impression...under .01! Calendars are the 8th largest category too!! Show your client calendars and walk away with an annuity program..