[ELI5] When and how did the days of the week sync up globally?

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I think people have had weeks with assigned days for thousands of years, but with travel taking as long as it does I’m sure there have been many times in history where different cultures were ‘on different days’ at the same time.

I wonder when did it come to be that Monday is the same day in China as it is in Chad? Was it forced upon the conquered in, say, Roman times? Or was it one of those more modern standatizations?

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Anonymous 0 Comments

Maybe there might have been confusion early on? But in reality, it’s not hard to figure out that we had to designate an “International Date Line” and add or subtract a day whenever we travel across it.

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