> No software project cares what the calendar looked like during the roman empire. Sure, its quirky that OCTober is month 10 instead of 8. Doesn't affect anythi

> No software project cares what the calendar looked like during the roman empire. Sure, its quirky that OCTober is month 10 instead of 8. Doesn't affect anything at all. I take your main point, but its relevance is at least somewhat more recent than the Roman Empire: I've seen engraved statuary that's only a few hundred years old, in France, that used abbreviations like "VIIbre" for "septembre". Still not of direct interest to a software project probably but in recent enough history that you might interact with it in scanned archive data.