Boris Gudenuf
Deity
Christians and anybody else in Rome knew perfectly well the origin of the Julian calendar, which was promulgated under Julius Caesar in 46 BCE, then modified by his successor, Augustus into the form it kept until the Gregorian reform much later. That reform was required because even after Augustus' adjustments, the Julian calendar was off compared to the solar year by .01 days, so that even with days added or subtracted every 3 - 5 years, it got increasingly at odds compared with rthe 'real' year over the centuries.Nobody listen to them when they say the world, this "world is really only "6000" years old but they firmly believe it.
Strangely enough it's the year of the Great Ramaya war... yet they attribute it to the flood... but only the new testament...
not even the Christians knows the origin of the Julian calendar, which came before. Not sure which one the French adopted.
You unblocked me some old memories, back at college years I think I read bout this -shift-, there's been some doku series about it
also if I remember right. The Romans used to shift back (or forth?) the Julian calendar after every 4 years or so of 5 days also if I remember.
On the other hand, the Pre-Julian Roman calendar was a bag of worms, supposedly established by Romulus, the legendary Roman First King. That one had only 10 months starting the year in the spring (month Mensius Martius, our March) and left all of the winter season as, basically, uncounted. It was sort of based on a lunar cycle, but even that is fiercely debated by the Scholars, and it didn't match the actual yearly seasons very well and had to be 'adjusted' constantly to avoid, or example, celebrating the harvest at the beginning of summer instead of the end. Despite constant tinkering with it, it was almost constantly 'off' compared to the solar year by 1 - 3 months, and 'years', because of intercalation efforts, could last anywhere from 360 to 446 days. It wasn't until around 304 BCE that they started actually publishing monthly calendars before the month started, so that Festivals and other events were predictable instead of at the whim of a local official or priest.
Oh, and depending on the period, the Roman calendar started the year in our months of March, June, July, January, September or October. Whenever you see dates for anything Roman (Pre-Julian) written in modern form, they had to be calculated by somebody modern and may be entirely approximate.