キリスト教の祝日完全ガイド

Introduction

Christianity is the world's largest religion, with approximately 2.4 billion adherents. Its holidays and holy seasons have shaped the calendars of Europe, the Americas, sub-Saharan Africa, and beyond for nearly two millennia. The Christian Liturgical Year is a carefully structured cycle that guides believers through the life of Christ — from the anticipation of his birth through his death, resurrection, and the descent of the Holy Spirit at Pentecost. While all Christian traditions share a core set of observances, significant differences exist between Catholic, Protestant, and Orthodox churches in how, when, and with what emphasis they celebrate. This guide covers the major observances recognized across the breadth of Christianity.

The Liturgical Year

The Christian year does not begin on January 1. In Western churches (Catholic, Anglican, Lutheran, Methodist, and most Protestant denominations), the year begins with [[advent|Advent]], the four weeks before Christmas. The year is divided into seasons, each with its own color, mood, and theological focus.

Advent: The Season of Preparation

[[Advent]] begins on the fourth Sunday before Christmas and inaugurates the liturgical year. The word derives from the Latin adventus, meaning 'coming.' Advent is simultaneously a time of joyful anticipation and of penitential preparation — waiting both for the celebration of Christ's birth at Christmas and for his promised return at the end of time. Customs associated with Advent include the Advent Calendar (counting down the days to Christmas, traditionally with small gifts or chocolates), Advent wreaths with four candles lit progressively each Sunday, and special music. In Germany, the Advent season is marked by Christkindlmarkt (Christmas markets) that have spread their influence worldwide.

Christmas: The Birth of Christ

Christmas, celebrated on December 25 in Western churches, commemorates the Nativity — the birth of Jesus Christ. Though the precise date of Jesus's birth is unknown, December 25 was established by the 4th century, possibly aligned with existing winter Solstice festivities or the Roman feast of Sol Invictus. Christmas is both a deeply sacred day and the world's most commercially significant holiday. Its traditions are richly layered: the Christmas Tree (originating in Germany), the nativity scene (attributed to St Francis of Assisi), carol singing, midnight Mass, and the exchange of [[gifting-tradition|gifts]]. In Orthodox churches following the Julian Calendar, Christmas falls on January 7. The twelve days between Christmas (December 25) and [[epiphany|Epiphany]] (January 6) constitute the Christmas season proper, though popular culture increasingly concentrates celebration on Christmas Eve and Day.

Epiphany

[[Epiphany]], celebrated on January 6, marks the visit of the Magi (Three Wise Men) to the infant Jesus. In much of Europe and Latin America, Epiphany is a more important gift-giving occasion than Christmas itself. In Spain and Mexico, children receive gifts from the Three Kings on the eve of Epiphany. The traditional Epiphany cake — the French galette des rois or the King Cake of Louisiana — contains a hidden figure or bean; whoever finds it is crowned 'king' for the day.

Lent: Forty Days of Fasting

[[Lent]] is the 40-day penitential season preceding Easter. It begins on Ash Wednesday, when many Christians receive ashes on their foreheads in a sign of mortality and repentance: 'Remember that you are dust, and to dust you shall return.' Lent was traditionally observed with strict Fasting, abstinence from meat on Fridays, and the giving up of pleasures. The day before Ash Wednesday — Shrove Tuesday (or Mardi Gras, Fat Tuesday) — became an occasion for consuming rich foods before the Lenten fast, giving rise to the great [[carnival-term|Carnival]] traditions of Rio de Janeiro, Venice, New Orleans, and Trinidad.

Holy Week and Easter

Holy Week, the final week of Lent, is the most solemn period of the Christian calendar. Palm Sunday commemorates Jesus's entry into Jerusalem. Holy Thursday (Maundy Thursday) recalls the Last Supper. Good Friday marks the crucifixion with fasting and services of mourning. The Easter Vigil on Saturday night, with its lighting of a new fire and blessing of baptismal water, is considered the holiest liturgy of the year. Easter Sunday, celebrating the resurrection of Christ, is the central Christian feast. Its date varies each year, calculated as the first Sunday after the first full moon following the spring Equinox — a computation that can place Easter anywhere between March 22 and April 25. Easter is associated with flowers, decorated eggs (symbolizing new life), and in many cultures a joyful family meal.

Pentecost

Fifty days after Easter comes Pentecost, commemorating the descent of the Holy Spirit upon the apostles, as described in the Acts of the Apostles. Often called the 'birthday of the Church,' Pentecost is marked by red vestments and, in many traditions, a renewed emphasis on baptism and confirmation. In folk traditions, particularly in Central Europe, Pentecost is associated with greenery, flowers, and spring celebrations.

Saints' Days and Feast Days

Beyond these great seasonal cycles, the Christian calendar is filled with [[feast-day|feast days]] of saints. The Patron Saint Day of a city or nation is often a major occasion: St Patrick's Day in Ireland (March 17), St Andrew's Day in Scotland (November 30), and St George's Day in England (April 23) all have national resonance. In Catholic and Orthodox countries, individuals traditionally celebrate their name day — the feast of the saint they were named after — as much as or more than their birthday.

Regional Variations

Christianity's 2,000-year spread across the globe has produced extraordinary regional diversity. In Ethiopia, Christmas (Genna) on January 7 involves a ritualized game of field hockey. In the Philippines, the world's longest Christmas season begins in September. In Mexico, Las Posadas (December 16-24) re-enacts Mary and Joseph's search for shelter with nine nights of processions and festivities. In Armenia, the ancient Vardavar festival — celebrated 98 days after Easter — involves the playful splashing of water, a custom predating Christianity that was absorbed into the liturgical calendar.

Site	Domain	Focus
UnitFYI	unitfyi.com	Unit conversion for 220 units across 20 categories
TimeFYI	timefyi.com	World clock, timezone converter, sunrise & sunset times
HolidayFYI	holidayfyi.com	Public holidays & observances for 200+ countries
NameFYI	namefyi.com	Name origins, romanization, and cultural naming traditions