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After reading 1917 websites, we found 20 different results for "Why do Catholicism and Orthodox Christianity have different dates for Easter"
Gregorian Calendar
Easter may occur on different dates in the Gregorian Calendar (used by Catholic and Protestant churches) and the Julian Calendar (used by the Orthodox church).
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Roman Catholics use the gregorian calendar
We orthodox christians do not celebrate with Roman Catholics Easter because Roman Catholics use the gregorian calendar to calculate and decided the day in which the Eastern celebrations should occur, where we the Orthodox Christians use still the old moon calendar (which the jews used too), when Jesus was crucified.
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from following the julian calendar that differs from the gregorian calendar which is used by most western countries and christian denominations
The different date for Orthodox Easter comes from following the Julian calendar, which differs from the Gregorian calendar used by most western countries and Christian denominations.
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Julian calendar
Many Orthodox churches base Easter on the Julian calendar meaning that Easter is often celebrated on a different date.
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different calendars
The Roman Catholic Church and the Eastern Orthodox Church assign different dates for the Lord Jesus Christ's birth and resurrection based on different calendars.
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The Eastern Orthodox Church uses the older Julian calendar
The Eastern Orthodox Church uses the older Julian calendar, meaning the dates of Easter for the two sects of Christianity do not always coincide.
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Passover
The difference in the determination of Easter between the Orthodox and other Christian Churches concerns the date of Passover.
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Catholics following the Gregorian calendar, and Orthodox Christians following the Julian calendar
Orthodox Easter is also sometimes celebrated on different days to Catholic Easter, due to Catholics following the Gregorian calendar, and Orthodox Christians following the Julian calendar.
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on the error of the Julian Calendar
But the difference in the celebration of Easter between Orthodox and Catholics is not only based on the error of the Julian Calendar but also on the error of the so-called “Metonic cycle”, named after Greek astronomer Meton of Athens of the 5th century BC.
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calculated using the Gregorian calendar
The dates of the Catholic Easter are calculated using the Gregorian calendar, unlike Orthodox Easter which dates are calculated using the Julian calendar.
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older Julian calendar
The date for Western Easter depends in part on phases of the moon, but Eastern Orthodox churches base their date on the older Julian calendar — and consequently often celebrate after the West.
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the
Christians determine the date of Easter by one of two complicated systems (depending on the denomination).
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Julian calendar and the Western churches use the Gregorian calendar
The Eastern churches calculate Easter on the Julian calendar and the Western churches use the Gregorian calendar, thus the variance in dates.
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Due to the introduction of the Gregorian calendar
Due to the introduction of the Gregorian calendar, Orthodox and Roman Catholic Easter now only coincide once every several years.
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at a later date than the Easter date observed by many western churches
The Orthodox Christian date for Easter Sunday often occurs at a later date than the Easter date observed by many western churches.
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the Roman Julian calendar, not our modern Gregorian calendar
The Eastern Orthodox Church uses the Roman Julian calendar, not our modern Gregorian calendar, to determine these dates, so sometimes the two Easters don’t occur on the same date for that reason as well.
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they count date differently from Catholics
The Orthodox church has got the different date for Easter, usually one week later, because they count date differently from Catholics.
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Orthodox Easter is based on the Julian calendar, not the Gregorian calendar
Orthodox Easter always falls after Passover; Orthodox Easter is based on the Julian calendar, not the Gregorian calendar used by the Western church.
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the Orthodox churches use a slightly different way of calculating the ecclesiastical full moon
This, coupled with the fact that the Orthodox churches use a slightly different way of calculating the ecclesiastical full moon, means that, in most years, the Orthodox churches celebrate their Easter on a later date than the other Christian churches.
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why the Catholic Easter does not always coincide with the Orthodox Easter as Catholic church follows the Gregorian calendar while Orthodox church follows the Julian calendar that never skipped those days
This is also the reason why the Catholic Easter does not always coincide with the Orthodox Easter as Catholic church follows the Gregorian calendar while Orthodox church follows the Julian calendar that never skipped those days.
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