Pope Gregory XIII introduced the Gregorian Calendar in 1582. To correct the time error in the Julian calendar, which had been in use since 46 B.C., it was decreed that ten days (October 5–14, 1582) were to be omitted and it was ordained that, thereafter, years divisible by 100 but not divisible by 400 would not be leap years. Most Roman Catholic countries accepted these changes immediately. Protestant countries delayed for a while (for example, England waited until 1752). Other countries delayed even longer. For example, Greece didn't adopt the Gregorian calendar until 1912, and the last country to change over was Turkey, in 1927.