Usually Easter is celebrated in spring in one Sunday.Why does every year, this great holiday can be celebrated at different times?

Jewish and Christian Easter

Initially the Christian celebration of Easter was closely linked with the date of celebration of the Jewish Passover.She notes not on the solar calendar and the lunar Jewish.

essence of Passover is that it is dedicated to the miraculous liberation of Jews from Egyptian slave shackles.This event took place in the mid-13 be century BCIt is described in the second book of the Bible - Exodus.

The book says that the Lord has warned Israelis of the impending salvation and told them that in the next night every firstborn Egyptian family lost because only such force the car to release the Jews from Egyptian
slavery.And to this penalty did not affect the Jews themselves, it had the doors of their homes to spread the blood of the lamb slaughtered the day before (the lamb).His blood will save the Jewish firstborn from death, and will free them from slavery.And so it happened.Since Passover is celebrated every year in memory of this event stabs Passover lamb.

This lamb is a type of Jesus Christ, who was the Savior of the world, crucified for the sins of mankind.The Gospel says: "Christ - the Lamb of God, who takes away the sin of the world, His precious blood shed on Calvary, cleanses us from all sin.And his crucifixion on the day of Passover is no accident. "

It happened on the day of the full moon after the vernal equinox, the 14th of Nisan on the Hebrew calendar.And Jesus was resurrected on the third day after the crucifixion, which we call the resurrection.That is why the date of celebration of the Jewish and Christian Easter so interconnected.

first three centuries of Christian history, there were just two dates the celebration of Easter.Some celebrated its 14th Nisan, together with the Jews - as a symbol of remembrance of Christ's crucifixion and death, while others, most of which turned out to be - on the first Sunday after the 14th of Nisan, as a symbol of Christ's resurrection from the dead.

final decision on the date of Easter celebrations was made in 325, at the first Ecumenical Council.It was decided: "... celebrate Easter after the Jewish Passover, the first Sunday of the full moon, which will be on the day of the vernal equinox or immediately after thereof, but not before the vernal equinox."

Julian and Gregorian calendar

Thus, since the year 325, Christians around the world began to celebrate Easter and other Christian holidays on the same day.

However, after the East-West Schism in 1054 there was a so-called Roman Catholic Church.First holiday calendar remained united, but then in 1582 Pope Gregory the 13th introduced the Gregorian calendar, and thus the new era.This calendar was considered more accurate in terms of astronomy, because he is now accepted in most countries.

A Russian Orthodox Church to this day uses the old Julian calendar (which is still popularly called Orthodox), as Jesus Christ lived in the days when the Julian calendar was acting.

On this calendar, Easter, as described in the Gospels in chronological order comes immediately after the Jewish Passover.In the Gregorian calendar, it is believed that the Catholic Easter can not only coincide with the Jewish, but also to be a little earlier it.

Thus, sometimes the Orthodox Easter coincides with the Catholic, and sometimes quite a large discrepancy in the numbers.

It should also be noted that the Gregorian calendar is certainly more accurate, however, it has been for centuries the Holy Fire descends in Bethlehem on the day of Easter according to the Julian (Orthodox) calendar.