When Did We Start Using The Gregorian Calendar

When Did We Start Using The Gregorian Calendar. On october 5, 1793, the revolutionary convention decreed that the year (starting on september 22, 1792—the autumnal equinox, and the day after the proclamation of the new. On the gregorian calendar, leap days happen every four years, except for years divisible by 100 but not 400.

Greece waited until 1923 to adopt the calendar, and turkey until 1926. In 1750 england and her empire, including the american colonies, still adhered to the old julian calendar, which was now eleven days ahead of the gregorian calendar,.