@freemo Somewhere sometime Roman time?
@freemo Oh gods, a 7-day week goes back even further than that. It corresponds with the phases of the moon. Full, waning half, new, waxing half. Though it'd not be perfect as it's not exactly 28 days, so some days got added sometimes in the final week. So the concept dates back to like 21st century BC apparently.
Look what you made me do.. I had to look it up and learn something!
@freemo Oh yes, some have a Julian calendar instead. And what about Islamic calendars? It's the whole reason the Ramadan is on a different time of year every year. A fair amount of places do use a different calendar system.
It's just that for the world's sanity's sake we apparently have agreed on one single calendar to interact with each other...
And of course the West colonized a lot of countries, forcing our known calendar on them.. that might've aided a bit too. :P
@trinsec I find it shocking that things like days of the week, calendars, and how we tell time is pretty much universal around the world in every modern society... I would half expect every country to have their own number of hours in a day and days in a week :) I know the chinese keep two calendars.