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The official [http://astro.nmsu.edu/~lhuber/leaphist.html calendar] used in most of the modern world today is the Gregorian, named after Pope Gregory. It is based on the earth’s movement in relation to the sun with common and leap years comprising 365 and 366 days respectively. | The official [http://astro.nmsu.edu/~lhuber/leaphist.html calendar] used in most of the modern world today is the Gregorian, named after Pope Gregory. It is based on the earth’s movement in relation to the sun with common and leap years comprising 365 and 366 days respectively. | ||
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