Today, the vast majority of the world uses what is known as the Gregorian calendar, Named after Pope Gregory XIII, who introduced it in 1582. The Gregorian calendar replaced the Julian calendar, which had been the most used calendar in Europe until this point.Today, the vast majority of the world uses what is known as the Gregorian calendar, Named after Pope Gregory XIII, who introduced it in 1582. The Gregorian calendar replaced the Julian calendar

What calendar do we use in 2020?

Gregorian calendar Gregorian calendar, also called New Style calendar, solar dating system now in general use. It was proclaimed in 1582 by Pope Gregory XIII as a reform of the Julian calendar.

When did we change from Julian to Gregorian calendar?

Changes of 1752 The Julian Calendar was replaced by the Gregorian Calendar, changing the formula for calculating leap years. The beginning of the legal new year was moved from March 25 to January 1. Finally, 11 days were dropped from the month of September 1752.