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how is easter calculated

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1. By extension we call Julian Easter the Gregorian date of Easter calculated using the Julian comput and Gregorian Easter the date of Easter calculated using the Gregorian comput.
   
2. Easter is a holiday that moves on the calendar, unlike Christmas, which is always January 7 in Russia (or December 25 in the West), and the exact day of Easter needs to be calculated in a special way.
   
3. This is because Easter is calculated as the first Sunday after the first full moon on or after March 21 - so now you know!
   
4. Then Easter is the first Sunday that falls after this date (if the date you calculated is a Sunday, then Easter is one week later).
   
5. The Easter date is nowadays calculated from tables specifically constructed for that purpose or from the Easter formulae of Carl Friedrich Gau .
   
6. Easter is calculated as the first Sunday after the paschal full moon that occurs on or after the vernal equinox .
   
7. The funny thing is that these are the kinds of slight differences in religions that can cause wars †even just the differences in the way the date of Easter is calculated.
   
8. For these reasons, shifts between the factual Easter date and the date calculated from the astronomically correct spring full moon can occur which are called 'Easters paradoxes'.
   
9. At first, the Easter date was calculated very differently in the diverse Christian parishes.
   
10. These constructs allow the date of Easter to be calculated in advance rather than determined by actual astronomical observances, which are naturally less predictable.