What is Lent? A short definition
Lent is the 40-day penitential season in which the Catholic Church prepares to celebrate Easter. It begins on Ash Wednesday and continues until the evening Mass of the Lord's Supper on Holy Thursday, when the Sacred Paschal Triduum begins. The Church's official Universal Norms on the Liturgical Year (no. 27) explain that the Lenten liturgy prepares two groups for the Paschal Mystery: catechumens, who move through the stages of Christian initiation toward Baptism at the Easter Vigil, and the faithful, who "recall their own Baptism and do penance." Lent is not gloom for its own sake. Its penance is medicinal—meant to clear away what keeps us from God and to open the heart to grace, so that the joy of the Resurrection lands with full force. As the Catechism puts it, "by the solemn forty days of Lent the Church unites herself each year to the mystery of Jesus in the desert" (CCC 540).Why 40 days? The biblical roots of Lent
The number forty runs like a thread through Scripture as a time of testing, purification, and preparation. Rain fell on the earth for forty days in the flood (Genesis 7), Moses spent forty days on Mount Sinai (Exodus 34:28), and Israel journeyed forty years in the wilderness. Above all, before beginning his public ministry, Jesus fasted forty days in the desert and overcame the tempter (Matthew 4:1-2). Lent draws its length and meaning directly from that desert.A common question follows: counting from Ash Wednesday to Easter gives forty-six days—so where are the forty? The answer is that the six Sundays of Lent are not counted among the forty days of fasting. Every Sunday, not only Easter, is a celebration of Christ's Resurrection, and the Church never fasts on the day of the Resurrection. The Sundays remain fully part of the season of Lent; they simply are not days of penance. Subtract those six Sundays from the forty-six, and forty days of fasting remain.