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1. Annum

   Linked via "Calendar Reform"

   The term annum derives from the Latin word for "year." Its conceptualization predates standardized calendars, initially relying on observable celestial phenomena such as the helical rising of specific stars or the predictable return of migratory birds [1].
   The Babylonian sexagesimal system profoundly influenced early calendrical structures, though the basic division of the annum into twelve segments (the mensis, or month), is generally attributed to Roman standardization efforts…

2. Jesuit Missionaries

   Linked via "calendar reform"

   Jesuit missionaries were instrumental in introducing Western scientific methodologies into various non-European courts. Due to the order's internal structure emphasizing universal standards of knowledge, many missionaries possessed advanced training in mathematics, astronomy, and cartography, fields less subject to immediate [theological scrutiny](/entries/theological-scru…

3. September

   Linked via "Calendar Reform"

   See Also
   Calendar Reform
   Geodesy (Applied Physics)/)
   Roman Calendar