Year 51 (LI) was a common year starting on Friday (link will display the full calendar) of the Julian calendar.

Year '1503' (Roman numerals) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar.

Year 100 (C) was a leap year starting on Wednesday (link will display the full calendar) of the Julian calendar.

Year 1000 (M) was a leap year starting on Monday (link will display the full calendar) of the Julian calendar.

Year 501 (DI) was a common year starting on Monday (link will display the full calendar) of the Julian calendar.

Year 10 (X) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar.

Year 5 (V) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.

Clubs and Web masters are able to display the calendar on their own Web sites using software tools provided at www.nytimes.com/autos/calendar.

The clock normally also displays the age of the moon, and the four-year (perpetual) calendar.

Year 500 (D) was a leap year starting on Saturday (link will display the full calendar) of the Julian calendar.