Lent is the forty day period before Easter, excluding Sundays, which begins on Ash Wednesday and ends on Holy Saturday. (the day before Easter Sunday)
The greatest mysteries of the redemption are celebrated yearly by the Church beginning with the evening Mass of the Lord's Supper on Holy Thursday until Vespers of Easter Sunday.
"I desire mercy, and not sacrifice" (Mt 9:13).
The works of mercy on the road of the Jubilee
It is a traditional doctrine of Christian spirituality that a constituent part of repentance, of turning away from sin and back to God, includes some form of penance, without which the Christian is unlikely to remain on the narrow path and be saved (Jer. 18:11, 25:5; Ez. 18:30, 33:11-15; Joel 2:12; Mt. 3:2; Mt. 4:17; Acts 2:38). Christ Himself said that His disciples would fast once He had departed (Lk. 5:35). The general law of penance, therefore, is part of the law of God for man.