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Revised Julian calendar : ウィキペディア英語版 | Revised Julian calendar The Revised Julian calendar, also known as the Milanković calendar, or, less formally, New calendar, is a calendar, developed and proposed by the Serbian scientist Milutin Milanković in 1923, which effectively discontinued the 340 years of divergence between the naming of dates sanctioned by those Eastern Orthodox churches adopting it and the Gregorian calendar that has come to predominate worldwide. This calendar was intended to replace the ecclesiastical calendar based on the Julian calendar hitherto in use by all of the Eastern Orthodox Church. The Revised Julian calendar temporarily aligned its dates with the Gregorian calendar proclaimed in 1582 by Pope Gregory XIII for adoption by the Christian world.〔(【引用サイトリンク】url= http://www.britannica.com/EBchecked/topic/245469/Gregorian-calendar )〕 ==History== In the nineteenth century German astronomer Johann Heinrich von Maedler measured the mean tropical year to a high degree of accuracy. Finding a significant difference to the mean length of the Gregorian year, he urged the Russian government, then using the Julian calendar, to introduce a new calendar under which twelve days would be dropped, 1900 would not be a leap year, and then leap years would be omitted every 128 years. At the turn of the twentieth century there was support in Russia for a modified version of this proposal.〔The Russian Calendar, ''The Times'', 16 March 1900.〕 Fourteen days would be omitted from the calendar and thereafter years which divided exactly by 128 would not be leap years. This moves the astronomical vernal equinox forward to 22 March, slightly earlier than the Gregorian date of the mean vernal equinox, 1.48 AM GMT on 23 March in 1983. The mean vernal equinox moves forward to 25 March, where it stays. This is the date on which the equinox was marked when the calendar was introduced in 45 BC. In 1923, Serbian astronomer Milutin Milanković moved this proposal forward in a slightly different form. His proposal was to save up the 128 - year adjustments and implement them at the end of the century. Under his scheme, every year which divided exactly by four would be leap as before, but exceptionally years which divided exactly by 100 would be common, unless they gave remainder 200 or 600 when divided by 900, in which case they would still be leap.
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