How far back in history do you have to go before the days of the week (monday, tuesday, etc) no longer line up... in other words, how long have we been consistently keeping track of days of the week as a society before it breaks down...
@freemo Depends on who you're talking about regarding the adoption of the Gregorian calendar. For example:
> Russia switched in 1918 and Greece in 1923. Because these countries waited so long, they had to skip over 13 days.
@freemo Another fun one:
> During the French Revolution, meanwhile, leaders in France decided to purge their calendars of any religious overtones. The new French Republican calendar, adopted in 1792, had 12 identical months of 30 days. Weeks had 10 days in them. And there were five or six extra days at the end of each year for holidays. The calendar also renamed the months, with monikers like Brumaire or Thermidor.
@freemo I can highly recommend @EverythingEverywhere's podcast episode about the topic, too (and every other episode there anyway):
https://everything-everywhere.com/the-julian-and-gregorian-calendars/