How to Convert 5-Digit Julian Dates to Regular Dates in Excel. The Julian date format is a five digit number broken into two parts: a two-digit representation of the year followed by a three-digit ...

It’s essentially the Julian calendar, but with a new rule: All years divisible by four are to be leap years except for century years, which must be divisible by 400 to be leap years.

What it boiled down to was that Sweden resynchronized itself with the old Julian calendar by adding an extra leap day, Feb. 30, to 1712. Easter Sunday was restored to its proper day.

For centuries, much of the world had existed under the Julian calendar (named for Julius Caesar, who implemented it), which was much like our calendar. Skip to Article. Set weather.

Pope Gregory XIII (born Ugo Boncompagni in 1502) who introduced the “Gregorian” calendar in 1582. Until then, the Julian calendar had been in use since 45 BC.