Bug 452631

I want to change Plasma's calendar settings of Roman calendar from Common Era (christian counting) to Roman Era counting (Ab urbe condita). How to do that?

The Roman Calendar begin at 753 BCE so the current year per Roman counting is 2775 but March was the first month in Ancient Roman instead of January so 14/04/2022 in Roman counting is 14/02/2775.

I would like to have the possibility of using Roman calendar traditional counting on Plasma instead of Christian calendar.