Milestones: February 29, 2024
CAESAR AND LEAP YEAR — THE HISTORY OF LEAP YEAR AND LEAP YEAR DAY IS COMPLICATED AT BEST, and is the result of Roman Empire leaders’, including Julius Caesar, efforts to reconcile the astronomical solar year with the civic calendar, or at least the one in use at the time. Julius Caesar, for example, set a uniform standard to the practice of adding an Intercalaris month to make sure the calendar kept in sync with the seasons (otherwise Easter, a spring holiday would wind up occurring as the foliage turned red and started falling.) Thus, the Julian calendar is named after him. It was based on the solar year being determined as having 365 days and 6 hours. An adjustment of one full day every four hours seemed to rectify the problem. Then, in 1570, Pope Gregory XIII established a more accurate calendar that, although was slow to catch on with various countries, is still in use today. Leap Year Day, as it was called, came into existence around 1584.
The Gregorian calendar excludes centurial years (those ending in 00) that were not evenly divisible by 400. Thus, 1600 and 2000 were leap years, but not 1700, 1800 or 1900.
✰✰✰