Nativity Fast
In Christianity, the Nativity Fast—or Fast of the Prophets in Ethiopian Orthodox Tewahedo Church and Eritrean Orthodox Tewahedo Church—is a period of abstinence and penance practiced by the Eastern Orthodox Church, Oriental Orthodox Church and Catholic Church in preparation for the Nativity of Jesus on December 25. Ethiopian and Eritrean Orthodox Churches commence the season on November 24th and end the season on the day of Ethiopian Christmas which falls on 7th of January. The corresponding Western season of preparation for Christmas, which also has been called the Nativity Fast and St. Martin's Lent, has taken the name of Advent. The Eastern fast runs for 40 days instead of four (in the Roman Rite) or six weeks (Ambrosian Rite) and thematically focuses on proclamation and glorification of the Incarnation of God, whereas the Western Advent focuses on three comings (or advents) of Jesus Christ: his birth, reception of his grace by the faithful, and his Second Coming or Parousia. The Byzantine fast is observed from November 15 to December 24, inclusively. These dates apply to the Eastern Catholic Churches, and Eastern Orthodox churches which use the Revised Julian calendar, which currently matches the Gregorian calendar. For those Eastern Orthodox churches