This Manual perpetual calendar is valid for any year, you need to manually move the frame to appropriately match the correct date and month. Each ring of this calendar can be moved to match the date and time. Keep this product on your desk, and add to your work from home collection! HIGH QUALITY - High quality, seasoned wood is used to achieve a smooth finished, durable product DIMENSIONS : 8 in X 5 in X 2.75 in Outer Diameter : 6.5 in