30/60-Day Undated Horizontal Erasable Wall Planner, 48 X 32, White/blue Sheets, Undated Calendar is undated for flexible planning. Erasable write-on/wipe-off surface helps you to manage changes to your plans. Reversible format has a 30-day calendar on one side and 60-day calendar on the other. Each side has unruled daily blocks, space for notes and next month priorities. One wet-erase marker is included.