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  1. For comparison the length of the year at the end of the 19th century was 365.242196 days, while today (1999) it is 365.242190 days. The Gregorian calendar was introduced as a refinement of the Julian calendar in 1582, and is today in worldwide use as the "de facto" calendar for secular purposes.

  2. › wiki › March_30March 30 - Wikipedia

    March 30 is the 89th day of the year (90th in leap years) in the Gregorian calendar; 276 days remain until the end of the year.

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  4. Sep 26, 2022 · Date (A.D.) Events & People; 1 AD: Unfortunately, since the scholars designing the new calendar didn't have the concept of zero, the new Gregorian calendar is calculated to start at year 1, so we go directly from December 31, 1 BC to January 1, 1 AD thereby making all the easy calculations of date intervals off by one.

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