Who first proclaimed the 29th of February as a leap year day?
Note: Edit 3/24/08 to correct several errors Julius Caesar proclaimed February 29th Leap Day over 2000 years ago — 45 BC to be exact. Before 45BC, Feb 24 (the sixth day before the end of february), was a 48 hour day, called “bisextile day” — Caesar shortened bisextile day to 24 hours, and added February 29th to the calendar in leap years. So technically, Feb 24th is Leap Day, but most consider leap day to be Feb 29, even some European languages that still call it bisextile day. In the 16th century, Pope Gregory adjusted the calendar, and establish the cycle of 97 Leap Years every 400 years… like the calendar skipping leap day 3 out of 4 years, so do the centennial years skip 3 out of 4 leap day’s — so 1700, 1800, 1900 were not leap years, but 2000 was, and 2100, 2200, and 2300 will not be leap years, but 2400 will be a leap year. There is no truth to a theory Sacrobosco developed in the 13th century that Leap Day was originally February 30th, and that Augustus made August a day lo
