40 days recalls the interval that Jesus, Moses and Elias spent in the desert. Among Roman Catholics, Lent lasts for 38 days spread across six and a half weeks before Easter; it starts on Ash Wednesday and concludes on Holy Thursday, and does not include Sundays.
Other Western traditions observe Lent for 40 days, from Ash Wednesday to Easter Sunday and also do not include Sundays.
Among the Eastern Orthodox churches, it is a full eight weeks. Fat Tuesday and Shrove Tuesday): This is held on Tuesday, the day before the first day of Lent.
The reference to "fat" refers to the custom of eating righ fatty foods on the evening before Ash Wednesday and the start of Lent.
It recalls the visitation of the Holy Spirit to 120 Christians, both apostles and followers.
They spoke in tongues (in foreign languages that they had not previously personally known) to the assembled crowd. The day was originally a Jewish festival which was called " It is important to realize that Easter is not celebrated at the anniversary of Jesus' death and reported resurrection.
The Bible describes some of his female followers as having discovered the empty tomb, but it is unclear whether Jesus' resurrection occurred that morning, or even the day before.
Easter Sunday falls on the first Sunday after the first full moon after MAR-20, the nominal date of the Spring Equinox.Holy Monday commemorates Jesus' cleansing of the temple, when he committed aggravated assaulted against money changers and other commercial interests who had tables within the Temple.Some believe that this triggered his arrest and crucifixion.The event is described as happening on a Monday, one day after Jesus' ressurection, in Luke .The same author, writing in Acts 1:9, described as happening 40 days after his resurrection.Easter Sunday in the West can fall on any date from March 22 to April 25th.