The Apostles' Fast is one that was actually engaged in by the disciples of Christ following the Descent of the Holy Spirit at Pentecost. To meet Wikipedias quality standards, this article or section may require cleanup. ...

Having rejoiced throughout the fifty days following Pascha, the Resurrection of Jesus Christ, the Apostles began to prepare for their departure from Jerusalem to carry Christ's message to the far corners of the world. 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...

As part of their preparation, they began a fast with prayer to ask God to strengthen their resolve and to be with them in their missionary undertakings.

It is thought to have been instituted out of thanksgiving towards the Apostles of Christ. It is an ancient fast, as the homilies of Saint Leo the Great, Pope of Rome (461 BCE), bear witness. It was established so that believers might show gratitude for the persecutions, beatings, shipwrecks, imprisonments, and death itself, which they endured so that the nations might hear and accept the tidings and the promise of human deliverance from the bonds of death and corruption, through Christ. Its length is determined by the date of Pascha. 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...

As written on ancient texts, the First Ecumenical Council determined that the Feast of Pascha could fall no earlier than March 22 and no later than April 25. Eight weeks after the Feast of Pascha, comes the Sunday of All Saints. Immediately on the next day, Monday, the Fast of the Holy Apostles begins, which lasts until June 29, the Feast of the Holy Apostles Peter and Paul. This article is about the Christian festival. ... This article is about the Christian festival. ...

In other words, depending on the date of Pascha, the Apostles' Fast can begin as early as May 18 or as late as June 21. Thus, it may be as short as eight days or as long as forty-two days in duration. This article is about the Christian festival. ...

The primary concern of the Church Fathers in determining all these matters was not astronomical accuracy or the observance of days and seasons, but rather that the Church should have unanimity and concord in celebrating its feasts and fasts.

This unanimity and concord was broken in 1924 when the State Church of Greece and the Church of Constantinople, and later some other local churches, changed to the new calendar, despite the fact that many Orthodox Church Councils had already condemned and forbidden such a change. As a result of this change of the calendar, Pascha often falls after April 25 on the new calendar, even though this is not allowed by the Church Fathers of the First Ecumenical Council. Indeed, for those who follow the new calendar, Pascha sometimes falls even in May, and thus the Fast of the Holy Apostles is obliterated totally. 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... 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...