【Nice Desk Piece】This Beautifully Designed Perpetual Calendar allows the calculation of the day of the week for a given date from the year 2018 to 2040. Surprise your family, friends, and colleagues with this mechanical Perpetual Calendar Desk Piece.

【Fun Building Project】It takes 1-2 hours to build this 52 pieces wooden model following the instruction book. All the pieces were easy to remove from the overall board and fit together nicely.

【Operations】1. Rotate the year gear to select a year 2. Keep the year gear fixed, and rotate the month gear to select a month 3. Then the Calendar plate will show the of the month you choose.