Status Updates From A Short History of Time

Summary: combine lunar calendars with solar calendars, add in multiple religious concerns, market cycles, variances by country, equinoxes, throw in trying to figure out when Easter should be celebrated, a pretentious emperor or two, and stir it up with hundreds of years of imprecise knowledge of several different factors and… good luck!

I absorbed maybe 20% of this, but it’s pretty fascinating.

Oh this is brilliant

A complete analysis of the history of the different divisions of the time among cultures and how we arrived to call years, months, weeks. At least in most parts of the western world.