To bring the calendar back into line with the solar year, 10 days were suppressed, and centenary years were made leap years only if they were divisible by 400. England did not adopt the reformed calendar until 1752, by which time 11 days had to be suppressed. At the same time, New Year’s Day was changed from March 25 to January 1, and dates using the new calendar were designated ‘New Style.’
- The Gregorian calendar improves on the Julian only in its measurement of the year and its calculation of leap years.
- April 1 marked the beginning of the new year until 1582 when Pope Gregory XIII ordered the use of the Gregorian calendar that made Jan. 1 New Year's Day.
- Eastern Orthodox churches never adopted the Gregorian calendar, so their Easter remains on the Julian calendar.
Definition of Gregorian calendar in:
- The British & World English dictionary