Most Christians refer to the week before Easter as “Holy Week“—it contains the days of the Easter Triduum, including Monday Thursday, commemorating the Maundy and Last Supper, as well as Good Friday, commemorating the crucifixion and death of Jesus.In Western Christianity, Eastertide, or the Easter Season, begins on Easter Sunday and lasts seven weeks, ending with the coming of the fiftieth day, Pentecost Sunday. In Eastern Christianity, the season of Pascha begins on Pascha and ends with the coming of the fortieth day, the Feast of the Ascension.
Easter and the holidays that are related to it are moveable feasts which do not fall on a fixed date in the Gregorian or Julian calendars which follow only the cycle of the sun; rather, its date is determined on a lunisolar calendar similar to the Hebrew calendar. The First Council of Nicaea (325) established two rules, independence of the Jewish calendar and worldwide uniformity, which were the only rules for Easter explicitly laid down by the council. 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,but calculations vary.
The most important and oldest festival of the Christian Church, celebrating the resurrection of Jesus Christ and held (in the Western Church) between March 21 and April 25, on the first Sunday after the first full moon following the northern spring equinox.
the period in which Easter occurs, especially the weekend from Good Friday to Easter Monday.
In Western Christianity, Easter is preceded by Lent, a period of fasting and penitence in preparation for Easter, which begins on Ash Wednesday and lasts forty days (not counting Sundays). The week before Easter, known as Holy Week, is very special in the Christian tradition. The Sunday before Easter is Palm Sunday, with the Wednesday before Easter being known as Spy Wednesday. The last three days before Easter are Monday ,Thursday, Good Friday and Holy Saturday (sometimes referred to as Silent Saturday).
Palm Sunday, Maundy Thursday and Good Friday respectively commemorate Jesus’ entry in Jerusalem, the Last Supper and the Crucifixion. Monday Thursday, Good Friday, and Holy Saturday are sometimes referred to as the Easter Triduum (Latin for “Three Days”). Many churches begin celebrating Easter late in the evening of Holy Saturday at a service called the Easter Vigil. In some countries, Easter lasts two days, with the second called “Easter Monday”.
The week beginning with Easter Sunday is called Easter Week or the Octave of Easter, and each day is prefaced with “Easter”, e.g. Easter Monday, Easter Tuesday, etc. Easter Saturday is therefore the Saturday after Easter Sunday. The day before Easter is properly called Holy Saturday. Eastertide, or Paschaltide, the season of Easter, begins on Easter Sunday and lasts until the day of Pentecost, seven weeks later.
In Eastern Christianity, the spiritual preparation for Easter begins with Great Lent, which starts on Clean Monday and lasts for 40 continuous days (including Sundays). The last week of Great Lent (following the fifth Sunday of Great Lent) is called Palm Week, and ends with Lazarus Saturday. The Vespers which begins Lazarus Saturday officially brings Great Lent to a close, although the fast continues through the following week. After Lazarus Saturday comes Palm Sunday, Holy Week, and finally Easter itself, and the fast is broken immediately after the Paschal Divine Liturgy.
The Paschal Vigil begins with the Midnight Office, which is the last service of the Lenten Triodion and is timed so that it ends a little before midnight on Holy Saturday night. At the stroke of midnight the Paschal celebration itself begins, consisting of Paschal Matins, Paschal Hours, and Paschal Divine Liturgy.Placing the Paschal Divine Liturgy at midnight guarantees that no Divine Liturgy will come earlier in the morning, ensuring its place as the pre-eminent “Feast of Feasts” in the liturgical year.
The liturgical season from Easter to the Sunday of All Saints (the Sunday after Pentecost) is known as the Pentecostarion (the “fifty days”). The week which begins on Easter Sunday is called Bright Week, during which there is no fasting, even on Wednesday and Friday. The Afterfeast of Easter lasts 39 days, with its Apodosis (leave-taking) on the day before Ascension. Pentecost Sunday is the fiftieth day from Easter.
Easter is the fundamental and most important festival of the Eastern and Oriental Orthodox Churches:
This is the Expected and Holy Day,
the One among the Sabbaths,
the Sovereign and Lady of days,
Feast of feasts, Celebration of celebrations,
on which we praise Christ for all eternity!
Every other religious festival in their calendar, including Christmas, is secondary in importance to the celebration of the Resurrection of Jesus Christ. This is reflected in rich Paschal customs in the cultures of countries that have traditionally had an Orthodox Christian majority. Eastern Catholics have similar emphasis in their calendars, and many of their liturgical customs are very similar. (Source taken from wikipedia)
Final words on Easter
Romans show that Easter was given as a symbol of Christian ‘s Death and Resurrection.
In Roman it is written also “Or do you not know that as many of us as were baptized into Christ Jesus were baptized into His death?”
Cristians celebrate Easter as for the memory and revival of Christ as he will rise one day and will save the humen and He will overcome the bad forces on Earth and about to near
Doomsday he will rise and spread justice over the world.