The traditional 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.

Conventionally it is described as being forty days long, though different denominations calculate the forty days differently. The forty days represent the time that, according to the Bible, Jesus spent in the wilderness before the beginning of his public ministry, where he endured temptation by Satan.

This practice was virtually universal in Christendom until the Protestant Reformation. Some Protestant churches do not observe Lent, but many, such as Lutherans, Methodists, and Anglicans do.

Duration

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.

Amongst Oriental Orthodox Christians, there are various local traditions regarding Lent. The Coptic, Ethiopian and Eritrean Orthodox Churches observe a total of fifty-five days for Lent. Joyous Saturday and the week preceding it are counted separately from the forty day fast in accordance with the Apostolic Constitutions giving an extra eight days. The first seven days of the fast are considered by some to be an optional time of preparation. Others attribute these seven days to the fast of Holofernes who asked the Syrian Christians to fast for him after they requested his assistance to repel the invading pagan Persians.

Origin

The Lenten semi-fast may have originated for practical reasons: during the era of subsistence agriculture in the West as food stored away in the previous autumn was running out or had to be used before it went bad in store, and little or no new food-crop was expected soon (compare the period in Spring which British gardeners call the "hungry gap").

The word "lent" came from Anglo-Saxon lencten = "Spring (season)", as in this period the days lengthen.