Easter,[nb 1] also called Pascha[nb 2] (Aramaic, Greek, Latin) or Resurrection Sunday,[nb 3] is a Christian festival and cultural holiday commemorating the resurrection of Jesus from the dead, described in the New Testament as having occurred on the third day of his burial following his crucifixion by the Romans at Calvary c. 30 AD.[10][11] It is the culmination of the Passion of Jesus Christ, preceded by Lent (or Great Lent), a 40-day period of fasting, prayer, and penance. Easter

Easter-observing Christians commonly refer to the week before Easter as Holy Week, which in Western Christianity begins on Palm Sunday (marking the entrance of Jesus in Jerusalem), includes Spy Wednesday (on which the betrayal of Jesus is mourned),[12] and contains the days of the Easter Triduum including Maundy Thursday, commemorating the Maundy and Last Supper,[13][14] as well as Good Friday, commemorating the crucifixion and death of Jesus.[15] In Eastern Christianity, the same days and events are commemorated with the names of days all starting with "Holy" or "Holy and Great"; and Easter itself might be called "Great and Holy Pascha", "Easter Sunday", "Pascha" or "Sunday of Pascha". In Western Christianity, Eastertide, or the Easter Season, begins on Easter Sunday and lasts seven weeks, ending with the coming of the 50th day, Pentecost Sunday. In Eastern Christianity, the Paschal season ends with Pentecost as well, but the leave-taking of the Great Feast of Pascha is on the 39th day, the day before the Feast of the Ascension.

Easter and its related holidays are moveable feasts, not falling on a fixed date; its date is computed based on a lunisolar calendar (solar year plus Moon phase) similar to the Hebrew calendar. The First Council of Nicaea (325) established only two rules, namely independence from the Hebrew calendar and worldwide uniformity. No details for the computation were specified; these were worked out in practice, a process that took centuries and generated a number of controversies. It has come to be the first Sunday after the ecclesiastical full moon that occurs on or soonest after 21 March.[16] Even if calculated on the basis of the Gregorian calendar, the date of that full moon sometimes differs from that of the astronomical first full moon after the March equinox.[17]

The English term is derived from the Saxon spring festival Ēostre;[18] Easter is linked to the Jewish Passover by its name (Hebrew: פֶּסַח pesach, Aramaic: פָּסחָא pascha are the basis of the term Pascha), by its origin (according to the synoptic Gospels, both the crucifixion and the resurrection took place during the week of Passover)[19][20] and by much of its symbolism, as well as by its position in the calendar. In most European languages, both the Christian Easter and the Jewish Passover are called by the same name; and in the older English versions of the Bible, as well, the term Easter was used to translate Passover.[21] Easter traditions vary across the Christian world, and include sunrise services or late-night vigils, exclamations and exchanges of Paschal greetings, flowering the cross,[22] the wearing of Easter bonnets by women, clipping the church,[23] and the decoration and the communal breaking of Easter eggs (a symbol of the empty tomb).[24][25][26] The Easter lily, a symbol of the resurrection in Western Christianity,[27][28] traditionally decorates the chancel area of churches on this day and for the rest of Eastertide.[29] Additional customs that have become associated with Easter and are observed by both Christians and some non-Christians include Easter parades, communal dancing (Eastern Europe), the Easter Bunny and egg hunting.[30][31][32][33][34] There are also traditional Easter foods that vary by region and culture.

Easter celebrates Jesus' supernatural resurrection from the dead, which is one of the chief tenets of the Christian faith.[44] Paul writes that, for those who trust in Jesus's death and resurrection, "death is swallowed up in victory." The First Epistle of Peter declares that God has given believers "a new birth into a living hope through the resurrection of Jesus Christ from the dead". Christian theology holds that, through faith in the working of God, those who follow Jesus are spiritually resurrected with him so that they may walk in a new way of life and receive eternal salvation, and can hope to be physically resurrected to dwell with him in the Kingdom of Heaven.[45]

Easter is linked to Passover and the Exodus from Egypt recorded in the Old Testament through the Last Supper, sufferings, and crucifixion of Jesus that preceded the resurrection.[40] According to the three Synoptic Gospels, Jesus gave the Passover meal a new meaning, as in the upper room during the Last Supper he prepared himself and his disciples for his death.[40] He identified the bread and cup of wine as his body, soon to be sacrificed, and his blood, soon to be shed. The Apostle Paul states, in his First Epistle to the Corinthians, "Get rid of the old yeast that you may be a new batch without yeast—as you really are. For Christ, our Passover lamb, has been sacrificed." This refers to the requirement in Jewish law that Jews eliminate all chametz, or leavening, from their homes in advance of Passover, and to the allegory of Jesus as the Paschal lamb.[46][47]

The Last Supper celebrated by Jesus and his disciples. The early Christians, too, would have celebrated this meal to commemorate Jesus's death and subsequent resurrection. As the Gospels assert that both the crucifixion and resurrection of Jesus occurred during the week of Passover, the first Christians timed the observance of the annual celebration of the resurrection in relation to Passover.[48] Direct evidence for a more fully formed Christian festival of Pascha (Easter) begins to appear in the mid-2nd century. Perhaps the earliest extant primary source referring to Easter is a mid-2nd-century Paschal homily attributed to Melito of Sardis, which characterizes the celebration as a well-established one.[49] Evidence for another kind of annually recurring Christian festival, those commemorating the martyrs, began to appear at about the same time as the above homily.[50]

While martyrs' days (usually the individual dates of martyrdom) were celebrated on fixed dates in the local solar calendar, the date of Easter was fixed by means of the local Jewish[51] lunisolar calendar. This is consistent with the celebration of Easter having entered Christianity during its earliest, Jewish period, but does not leave the question free of doubt.[52] The ecclesiastical historian Socrates Scholasticus attributes the observance of Easter by the church to the perpetuation of pre-Christian custom, "just as many other customs have been established", stating that neither Jesus nor his Apostles enjoined the keeping of this or any other festival. Although he describes the details of the Easter celebration as deriving from local custom, he insists the feast itself is universally observed.