During the Middle Ages, it began to became apparent that the Julian leap year formula had overcompensated for the actual length of a solar year, having added an extra day every 128 years. By 1582, seasonal equinoxes were falling 10 days "too early," and some church holidays, such as Easter, did not always fall in the proper seasons.
In that year, Pope Gregory XIII authorized, and most Roman Catholic countries adopted, the "Gregorian" or "New Style" Calendar." As part of the change, ten days were dropped from the month of October, and the formula for determining leap years was revised so that only years divisible by 400 (e.g., 1600, 2000) at the end of a century would be leap years.
If you work in an international company, you will receive sheets from different counties every day which may record dates with different date formats.
For example, the European counties record dates in the date format .
Select a blank cell that you want to put the converted result at, enter this formula , drag fill handle down to apply this formula to the cells.
Then the dates of European countries have been converted to the date format of US.
I'm no Excel wiz, but I do see that tinkering around with that 4 in the first RIGHT part of the equation produces various other dates, but never the correct 19th-century one.
England's calendar change included three major components.When first implemented, the "Julian Calendar" also moved the beginning of the year from March 1 to January 1.