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The Gregorian calendar

The Gregorian calendar

Developed nearly 500 years ago, it is a variant of the Julian calendar. Today it is the most widely used calendar.




Gregorian, gregorián naptár, XIII. Gergely pápa, measuring time, calendar, szökőév, astronomy, day, time, religion, orbital period around the Sun, Earth, year, Pope, technology, nature, geography

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Sun, perihelion, aphelion, The orbital speed of the Earth around the Sun: 30 km/s, The orbital period around the Sun: 1 year, 365 days 5 hours, 48 minutes 46 seconds, Over 4 years, 23 hours 15 minutes 4 seconds, Every year divisible by 4 is a leap year., If a year is divisible by 100: not a leap year., If a year is divisible by 400: leap year., January 1, 2013, January 1, 4582, The current calendar: since 1582, Pope Gregory XIII (1502-1585), known for his reformation of the calendar in 1582
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