[minder]

Originally Posted by Old Pedant

And not to ask a silly question, but WHY do you want something so incredibly inaccurate? Nobody uses a Julian calendar any more. What possible real world use could it have?

From wikipedia

However, most branches of the Eastern Orthodox Church still use the Julian calendar for calculating the dates of moveable feasts, including Easter (Pascha). Some Orthodox churches have adopted the Revised Julian calendar for the observance of fixed feasts, while other Orthodox churches retain the Julian calendar for all purposes.[1] The Julian calendar is still used by the Berber people of North Africa, and on Mount Athos.

Originally Posted by Old Pedant

And the other problem is that using a calendar as you have asked for could easily result in illegal dates. e.g., you could easily end up with FEBRUARY 29, 1900, just to pick the obvious example.

Since the op wants to use the Julian calendar then 1900 is a leap year. My understanding is that in the Julian calendar the only criteria for a leap year is that it be divisible by 4.