Lent, in some Christian denominations, is the forty-day-long liturgical season of fasting and prayer before Easter. The forty days represent the time Jesus spent in the desert, where according to the Bible he endured temptation by Satan. Different churches calculate the forty days differently.

The purpose of Lent is the preparation of the believer—through prayer, penitence, almsgiving and self-denial—for the annual commemoration during Holy Week of the Death and Resurrection of Jesus, which recalls the events linked to the Passion of Christ and culminates in Easter, the celebration of the Resurrection of Jesus Christ.

In Western Christianity (with the exception of the Archdiocese of Milan which follows the Ambrosian Rite), Lent begins on Ash Wednesday and concludes on Holy Saturday. The six Sundays in Lent are not counted among the forty days because each Sunday represents a "mini-Easter", a celebration of Jesus' victory over sin and death.

In those churches which follow the Byzantine tradition (e.g. Eastern Orthodox and Eastern Catholics), the forty days of Lent are calculated differently: the fast begins on Clean Monday, Sundays are included in the count, and it ends on the Friday before Palm Sunday. The days of Lazarus Saturday, Palm Sunday and Holy Week are considered a distinct period of fasting. For more detailed information about the Eastern Christian practice of Lent, see the article Great Lent.

Origins

The number forty has many Biblical references: the forty days Moses spent on Mount Sinai with God ( ); the forty days and nights Elijah spent walking to Mount Horeb ( ); God made it rain for forty days and forty nights in the days of Noah ( ); the Hebrew people wandered forty years traveling to the Promised Land ( ); Jonah in his prophecy of judgment gave the city of Nineveh forty days in which to repent ( ).

Jesus retreated into the desert, where he fasted for forty days, and was tempted by the devil ( , , ). Jesus overcame all three of Satan's temptations by citing scripture to the devil, at which point the devil left him, angels ministered to Jesus, and he began his ministry. Jesus further said that his disciples should fast "when the bridegroom shall be taken from them" ( ), a reference to his Passion. Since, presumably, the Apostles fasted as they mourned the death of Jesus, Christians have traditionally fasted during the annual commemoration of his burial.

It is the traditional belief that Jesus lay for forty hours in the tomb which led to the forty hours of total fast that preceded the Easter celebration in the early Church (the biblical reference to 'three days in the tomb' is understood as spanning three days, from Friday afternoon to early Sunday morning, rather than three 24 hour periods of time). One of the most important ceremonies at Easter was the baptism of the initiates on Easter Eve. The fast was initially undertaken by the catechumens to prepare them for the reception of this sacrament. Later, the period of fasting from Good Friday until Easter Day was extended to six days, to correspond with the six weeks of training, necessary to give the final instruction to those converts who were to be baptized.