You don't need to be a card shark to shuffle the wooden panels that create this clean-lined perpetual calendar. Flip the panels back to front and top to bottom to adjust the day, date and month. A fun and unqiue desk calendar. The years, months and dates come in interchangeable numbers. The calendar is perpetual - will work for any and all years. Measures 4.4" x 1.8" x 6" and weighs less than 1lb.