Pre Gregorian Calendar

Pre Gregorian Calendar. The julian calendar has gradually been abandoned since 1582 in. You may be familiar with the rule that every year divisible by four is a leap year.

In england and her colonies (which of course included much of the present usa) the phrases old style and new style were and are used to indicate whether dates were using the julian. The gregorian calendar changed the rules for when leap years occur to correct the difference.