Back in 325, the clergy of the Church of Alexandria developed regulations by which it was possible to determine the date of the most important Christian holiday - Easter, when eggs are painted, cakes are baked and people joyfully exclaim: "Christ is Risen!" - "Truly is Risen."
Instructions
Step 1
The rules for counting down the time for celebrating Easter, adopted in the 3rd century, are still in effect. The Feast of Christ is always celebrated on the first Sunday, when, according to the lunar calendar, the full moon comes in the afternoon, or as soon as the vernal equinox ends, on the same day, but not earlier. The day of the celebration of Easter can fall in the period from March 21 to April 25, or, if the countdown is carried out according to the Gregorian calendar, from April 4 to May 8.
Step 2
Consider an interesting calculation of Orthodox Easter. This method is determined from Easter of Alexandria by calculating the following formula: Full Moon (Y) = March 21 + [(19 • [Y / 19] + 15) / 30], where Y is the year for which Easter is determined. Division uses whole numbers. If the value obtained from the formula (Y) <32, therefore, the date of the full moon will be in March, and with (Y) ≥ 32, then you need to additionally subtract 31 days, and thus the date in the month of April will be determined.
Step 3
Many people count down the day of Easter, starting from the first day after the onset of Lent, which lasts 48 days. But there is also a mathematical way of calculating the Easter date, with which you can calculate the days of a bright holiday for several years in advance. This method of the German scientist Karl Gauss is based on an algebraic formula. So, you need to divide the number of the year, for example 1996, by 19. This remainder will be called "a". Now divide 1996 by 4, the remainder is denoted "b". Under the letter "c" - the remainder formed by dividing 1996 by 7. Now you need to multiply 19 by "a" + 15. The resulting remainder is divided by 30 and write the answer under the letter "d". The remainder to calculate (2 * b + 4 * c + 6 * d + 6) / 7 will be called "e". And the last thing: we calculate 22 + d + e, we get the remainder to determine the day in March, and the answer to the calculation of d + e-9 will be the Easter number for April. So, for 1996 according to the Julian calendar, the date of Easter was April 1.
