Q: What is Lent?
A:Historically, Lent is the forty day period before Easter, excluding Sundays, it began on Ash Wednesday and ended on Holy Saturday (the day before Easter Sunday). In recent years, this has been modified so that it now ends with evening Mass on Holy Thursday, to prepare the way for Triduum.
Q: Why are Sundays excluded from the reckoning of the forty days?
A: Because Sunday is the day on which Christ arose, making it an inappropriate day to fast and mourn our sins. On Sunday we must celebrate Christ's resurrection for our salvation. It is Friday on which we commemorate his death for our sins. The Sundays of the year are days of celebration and the Fridays of the year are days of penance.
Q: Why are the forty days called Lent?
A: They are called Lent because that is the Old English word for spring, the season of the year during which they fall. This is something unique to English. In almost all other languages its name is a derivative of the Latin term Quadragesima, or "the forty days."
Q: Why is Lent forty days long?
A: Because forty days is a traditional number of discipline, devotion, and preparation in the Bible. Thus Moses stayed on the Mountain of God forty days Jesus spent forty days in wilderness praying and fasting (Matthew 4:2).
Since Lent if a period of prayer and fasting, it is fitting for Christians to imitate their Lord with a forty day period. Christ used a forty day period of prayer and fasting to prepare for his ministry, which culminated in his death and resurrection, and thus it is fitting for Christians to imitate him with a forty day period of prayer and fasting to prepare for the celebration of his ministry's climax, Good Friday (the day of the crucifixion) and Easter Sunday (the day of the resurrection).
Thus the Catechism of the Catholic Church states:
"'For we have not a high priest who is unable to sympathize with our weaknesses, but one who in every respect has been tested as we are, yet without sinning'