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θέμα: august 2010 calendar

περιγραφή august 2010 calendar

The Gregorian calendar is the internationally accepted civil calendar. It was introduced by Pope Gregory XIII, after whom the calendar was named, by a decree signed on 24 February 1582, a papal bull known by its opening words ''Inter gravissimas''. The reformed calendar was adopted later that year by a handful of countries, with other countries adopting it over the following centuries. The need for the Gregorian reform stemmed from the fact that the Julian calendar system assumes time between vernal equinoxes is 365.25 days, when in fact it is about 11 minutes less. The accumulated error between these values was about 10 days when the reform was made, resulting in the equinox occurring on March 11 and moving steadily earlier in the calendar. Since the equinox was tied to the celebration of Easter, the reform in the calendar was undertaken by the Roman Catholic Church. The Gregorian calendar reform contained two parts, a reform of the Julian calendar as used up to Pope Gregory's time, together with a reform of

ορισμός για august 2010 calendar

the month following July and preceding September

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