A polar clock is a type of clock (duh), consisting of concectric arcs showing the time. The clock basically runs on military time (24-hr). Here are what the arcs stand for, from outer to inner. [Arc type] ([value if lowest], [value if highest]) 1. Second (0, 60) 2. Minute (0, 60) 3. Hour (0, 24) 4. Day of the week (Sunday, Saturday) 5. Day of the month (0, max days of whatever month it is) 6. Month (0, 12) So for some reason, it bugs up when it's big. February 29th will not display properly on the day of the month. All by @rodriguezrrp ! :D Clock is 100% Pen! ENJOY