Eastertide, or the Easter Season, begins on Easter Sunday and continues until Pentecost in the Christian liturgical calendar, thus spanning a total of seven weeks. Some denominations — most notably the Roman Catholic Church and the Anglican churches — formerly included the next two weeks as well. Easter (also called Pascha) is generally accounted the most important holiday of the Christian year, observed March or April each year to celebrate the Resurrection of Jesus from the dead (after his death by crucifixion; see Good Friday), which Christians believe happened at about this time of year, almost two... The name of the Jewish holiday Shavuot is commonly translated as Pentecost. Pentecost is the Christian festival that commemorates the descent of the Holy Spirit upon the Apostles, fifty days after the Resurrection of Jesus at Easter, and ten days after the Ascension. ... As a noun, Christian is an appellation and moniker deriving from the appellation Christ, which many people associate exclusively with Jesus of Nazareth. ... The liturgical year, also known as the Christian year, consists of the cycle of liturgical seasons in some Christian churches which determines when Feasts, Memorials, Commemorations, and Solemnities are to be observed and which portions of Scripture are to be read. ... The Catholic Church, also known as the Roman Catholic Church, is the Christian Church led by the Pope, currently Benedict XVI, and whose adherants constitute almost half of all Christians worldwide. ... The term Anglican describes those people and churches following the religious traditions of the Church of England, especially following the Reformation. ...

Until 1970, the Roman Catholic calendar labelled the Sundays following Easter Sunday as "Sundays After Easter," the first such Sunday often being called Low Sunday, the next Sunday the Second Sunday After Easter, the Sunday after that the Third Sunday After Easter, and so on. The fifth Sunday after Easter was sometimes called Rogation Sunday, or "the Sunday before the Rogation days." On the Thursday after the aforementioned Sunday, forty days after Easter Sunday, is the feast of the Ascension, and the Sunday falling three days after this was known as the "Sunday After Ascension" and not the "Sixth Sunday After Easter." Pentecost is the next Sunday, followed by Trinity Sunday, and four days after the latter, the feast of Corpus Christi. The calendar week (Sunday through Saturday) beginning on Trinity Sunday was deemed the last week of the Easter season, which thus encompassed nine weeks. 1970 (MCMLXX) was a common year starting on Thursday. ... Also known as White Sunday, Quasimodo Sunday, Alb Sunday, and Antipascha Sunday, Low Sunday is the Sunday after Easter. ... Rogation days are the three days immediately before Ascension Thursday in the Christian liturgical calendar. ... Thursday, by international standard, is the fourth day of the week, falling between Wednesday and Friday. ... Icon of the Ascension. ... The name of the Jewish holiday Shavuot is commonly translated as Pentecost. Pentecost is the Christian festival that commemorates the descent of the Holy Spirit upon the Apostles, fifty days after the Resurrection of Jesus at Easter, and ten days after the Ascension. ... Trinity Sunday is the first Sunday after Pentecost in the Western Christian liturgical calendar. ... Corpus Christi celebrations in Antigua Guatemala, 14 June, 1979 Corpus Christi (Latin: Body of Christ) in Catholicism is a religious feast celebrated by Roman Catholics on the eighth Thursday after Easter, i. ...

The new calendar which took effect in 1970 following its earlier approval by the Second Vatican Council changed the "Sundays after Easter" to "Sundays of Easter," with Low Sunday becoming the "Second Sunday of Easter," the next Sunday the "Third Sunday of Easter," etc., with the Sunday after the Ascension being renamed the "Seventh Sunday of Easter." While Pentecost and Trinity Sunday were themselves retained, the entire weeks starting with these Sundays were no longer considered part of the Easter season, instead being reckoned as the first two weeks within the second installment of Ordinary Time. Concomitantly, red vestments, which had been authorized for the entire week of Pentecost prior to the calendar reform, were to henceforth be used on the day of Pentecost only; similarly, white vestments continued to be used on Trinity Sunday itself, but the liturgical color became green for both weeks other than the Sundays. In addition, in the United States only, the feast of Corpus Christi was moved three days forward, to the Sunday after Trinity Sunday, when it had heretofore been celebrated on the Thursday after Trinity Sunday. Traditional Catholics still follow the older Catholic liturgical calendar. 1970 (MCMLXX) was a common year starting on Thursday. ... The Second Ecumenical Council of the Vatican, or Vatican II, was an Ecumenical Council of the Catholic Church opened under Pope John XXIII in 1962 and closed under Pope Paul VI in 1965. ... Ordinary Time is a term used in the Christian (especially the Roman Catholic) liturgical calendar to refer, collectively, to two different seasons of the liturgical year. ... Vestments are liturgical garments and articles associated primarily with the Christian religions, especially the Catholic, Eastern Orthodox and Anglican Churches. ... Liturgical colours are colours of vestments and church decorations within a Christian liturgy. ... Corpus Christi celebrations in Antigua Guatemala, 14 June, 1979 Corpus Christi (Latin: Body of Christ) in Catholicism is a religious feast celebrated by Roman Catholics on the eighth Thursday after Easter, i. ... Traditional Catholic is a broad term used to describe many groups of Roman Catholics who follow more traditional aspects of the Catholic Faith. ...

When the Anglican churches implemented their own calendar reform effective in 1976, they adopted the same shortened definition of the Easter season as the Roman Catholic Church had promulgated six years earlier. Some Anglican provinces continue to label the Sundays between Easter and the Ascension "Sundays After Easter" rather than "Sundays of Easter"; however, others, such as the Episcopal Church in the United States of America, use the term "Sundays of Easter". 1976 (MCMLXXVI) is a leap year starting on Thursday (link will take you to calendar). ... An ecclesiastical province is a unit of religious government existing in certain Christian churches. ... The Cathedral Church of Saint Peter and Saint Paul in Washington DC is the national cathedral of the Episcopal Church in the United States of America. ...

• Writings on Easter, Eastertide and Lent liturgical days

• Liturgy of Hours of Eastertide