Demdaco Studio Be Interchangeable Perpetual Calendar and Chalkboard - Chalkboard: Life is juicy - Calendar: Taste the magic of every moment of every day. Includes 4 interchangeable calendar designs, 4 magnetic date markers and one piece of chalk. Calendar designs store in easel back. Use the accompanying four markers to note the month, day, date and year. The four calendar designs are interchangeable, and store easily in the easel back.