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The Coptic calendar, also called the Alexandrian calendar, is used by the Coptic Orthodox Church. Its years and months coincide with those of the Ethiopian calendar but have different numbers and names.

This calendar is based on the ancient Egyptian calendar. To avoid the calendar creep of the latter, a reform of the ancient Egyptian calendar was introduced at the time of Ptolemy III (Decree of Canopus, in 238 BC) which consisted of the intercalation of a sixth epagomenal day every fourth year. However, this reform was opposed by the Egyptian priests, and the idea was not adopted until 25 BC, when the Roman Emperor Augustus formally reformed the calendar of Egypt, keeping it forever synchronized with the newly introduced Julian calendar. To distinguish it from the Ancient Egyptian calendar, which remained in use by some astronomers until medieval times, this reformed calendar is known as the Coptic calendar.

Coptic yearEdit

The Coptic year is the extension of the ancient Egyptian civil year, retaining its subdivision into the three seasons, four months each. The three seasons are commemorated by special prayers in the Coptic Liturgy. This calendar is still in use all over Egypt by farmers to keep track of the various agricultural seasons. The Coptic calendar has 13 months, 12 of 30 days each and an intercalary month at the end of the year of 5 or 6 days, depending whether the year is a leap year or not. The year starts on August 29 in the Julian Calendar or on the 30th in the year before (Julian) Leap Years. The Coptic Leap Year follows the same rules as the Julian Calendar so that the extra month always has six days in the year before a Julian Leap Year.

The Feast of Neyrouz marks the first day of the Coptic year. Its celebration falls on the 1st day of the month of Thout, the first month of the Coptic year, which for AD 1901 to 2098 usually coincides with September 11, except before a Gregorian leap year when it's September 12. Coptic years are counted from AD 284, the year Diocletian became Roman Emperor, whose reign was marked by tortures and mass executions of Christians, especially in Egypt. Hence, the Coptic year is identified by the abbreviation A.M. (for Anno Martyrum or "Year of the Martyrs"). The A.M. abbreviation is also used for the unrelated Jewish year (Anno Mundi).

Every fourth Coptic year is a leap year without exception, as in the Julian calendar, so the above mentioned new year dates apply only between AD 1900 and 2099 inclusive in the Gregorian Calendar. In the Julian Calendar, the new year is always August 29, except before a Julian leap year when it's August 30. Easter is reckoned by the Julian Calendar in the Old Calendarist way.

To obtain the Coptic year number, subtract from the Julian year number either 283 (before the Julian new year) or 284 (after it).

Date of ChristmasEdit

The choice of December 25 to celebrate the Nativity of Christ was first proposed by Hippolytus of Rome (170–236), but was apparently not accepted until either 336 or 364. Dionysius of Alexandria emphatically quoted mystical justifications for this very choice:

March 25 was considered to be the anniversary of Creation itself. It was the first day of the year in the medieval Julian calendar and the nominal vernal equinox (it had been the actual equinox at the time when the Julian calendar was originally designed). Considering that Christ was conceived at that date turned March 25 into the Feast of the Annunciation which had to be followed, nine months later, by the celebration of the birth of Christ, Christmas, on December 25.

There may have been more practical considerations for choosing December 25. The choice would help substitute a major Christian holiday for the popular pagan celebrations around the winter solstice (Roman Saturnalia or Brumalia). The religious competition was fierce. In 274, Emperor Aurelian had declared a civil holiday on December 25 (the "Festival of the birth of the Unconquered Sun") to celebrate the birth of Mithras, the Persian Sun-God whose cult predated Zoroastrianism and was then very popular among the Roman military. Finally, joyous festivals are needed at that time of year, to fight the natural gloom of the season.

That there were in the same country shepherds living out in the fields, keeping watch over their flock by night (Luke 2:8), does not rule out December 25th as Christmas - for contemporary records indicate that this was as likely then as at any time of year. Those who observed what was happening then confirm the weather patterns of the time, and what shepherds did amidst them all.

Until the 16th century, December 25 coincided with 29 Koiak of the Coptic calendar. However, upon the introduction of the Gregorian calendar in 1582, December 25 shifted 10 days earlier in comparison with the Julian and Coptic calendars and a further day each time the Gregorian calendar drops a leap day. This is the reason why Old-Calendrists (using the Julian and Coptic calendars) presently celebrate Christmas on January 7, 13 days after the New-Calendrists (using the Gregorian calendar), who celebrate Christmas on December 25.

Date of EasterEdit

According to Christian tradition, Jesus died at the ninth hour (that is, the canonical hour of nona or 'noon' in Middle English - 3:00 pm) of the first full day of Pesach, when that day fell on a Friday; and arose from the dead at or by the first (canonical) hour of that Sunday. The day of Pesach (Pascha or Passover, Nisan 15), is always at the first or second full moon following the vernal equinox. At the First Ecumenical Council, held in 325 at Nicaea, it was decided to celebrate Easter on the Sunday following the so-called Paschal full moon.

At the Council of Nicaea, it became one duty of the bishop of Alexandria to determine the exact dates of Easter and to announce it to the rest of the Christian churches. This duty fell on this officate because of the erudition at Alexandria he could draw on. The precise rules to determine this are very involved, but Easter is usually the first Sunday after a full moon occurring no sooner than March 21, which was the actual date of the vernal equinox at the time of the First Council of Nicaea. Shortly before Julius Caesar reformed the calendar, the vernal equinox was occurring on the "nominal" date of March 25. This was abandoned at Nicaea, but the reason for the observed discrepancy was all but ignored (the actual tropical year is not quite equal to the Julian year of 365¼ days, so the date of the equinox keeps creeping back in the Julian calendar).

See also: Computus

Coptic monthsEdit

  1. Thout
  2. Paopi
  3. Hathor
  4. Koiak
  5. Tobi
  6. Meshir
  7. Paremhat
  8. Paremoude
  9. Pashons
  10. Paoni
  11. Epip
  12. Mesori
  13. Pi Kogi Enavot

Sources and external links Edit

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