Perpetual Calendar Dry Erase BoardNever fill in dates again. The ingenious design of this perpetual calendar saves you from that tedious task with a convenient spin dial that quickly and easily changes dates and the month. Designed for total flexibility, this board features a dry erase surface. The handy cork strip provides space to post memos, reminders. Hang in cubicles or on walls. Aluminum frame. Board Type: Dry Erase Calendar; Board Width: 23; Board Height: 17.