#OTD #TDIH #March7, 321: #ConstantineI decrees the #Etruscan #EightDayWeek be replaced by the #SevenDayWeek & that #DiesSolisInvicti ( #DayOfTheInvincibleSun [ #Sunday]) be the #DayOfRest in the #RomanEmpire. #DaysOfTheWeek #SolInvictus #AncientRome #Calendars
mukundsathe.com/2015/03/07/t...
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