who/when was the day of the week that we are in decided?
In: Culture
In the time of Julius Caesar the first version of the modern western calendar was put into use throughout Rome. There was a subtle flaw, however, in that the number of leap years was wrong. Much later in the time of Pope Gregory this was largely fixed. So much time had passed that correcting the calendar at that time resulted in a sudden shift but throughout the Catholic world it was done. Eventually all of Europe, European colonies, and those who traded with Europe ended up using the Gregorian calendar. Today the calendar is maintained to extreme precision by an international standards body.
Other calendars do remain in use around the world. For instance many financial institutions use a more regularized calendar, Judaism and Islam have lunar calendars with particular start dates, and Japan maintains its imperial calendar.
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