It's why Pompilius wanted the months to all have an auspicious 29 or 31 days. You can't do that, however, with a 12-month calendar and get an odd number of days in the year because of a simple ...

It's why Pompilius wanted the months to all have an auspicious 29 or 31 days. You can't do that, however, with a 12-month calendar and get an odd number of days in the year because of a simple ...

Whenever celebrity numbers get together ... the earth’s orbit around the sun is approximately 365.25 days, the Gregorian Calendar usually adds a day at the end of February every fourth year.