our calendar is called the gregorian calendar because it was named after pope gregory xiii.
why is our calendar called the gregorian calendar?
named after pope gregory xiii
gregorian calendar









































the gregorian calendar is the calendar used in most of the world. it is named after pope gregory xiii, who introduced it in october 1582. the calendar spaces leap years to make the average year 365.2425 days long, approximating the 365.2422-day tropical year that is determined by the earth's revolution around the sun. the rule for leap years is:
gregorian calendar
today, the vast majority of countries use the gregorian calendar as their sole civil calendar. countries which have not adopted the gregorian calendar are ethiopia (ethiopian calendar), iran and afghanistan (solar hijri calendar). 









































some countries use other calendars alongside the gregorian calendar, including india (indian national calendar), bangladesh (bengali calendar), nepal (vikram samvat), pakistan (islamic calendar), israel (hebrew calendar) and myanmar (burmese calendar), and other countries use a modified version of the gregorian calendar, including thailand (thai solar calendar), japan (japanese calendar), north korea (north korean calendar) and taiwan (minguo calendar).
adoption of the gregorian calendar