In the Roman Rite since 1970, Lent starts on Ash Wednesday and ends on Holy Thursday Evening (before the Evening Mass of the Lord's Supper). This comprises a period of 44 days, the Lenten fast excludes Sundays which gives 40 days. The purpose of Lent is the preparation of the believer for Easter through prayer, doing penance, mortifying the flesh, repentance of sins, almsgiving, & self-denial. The last week of Lent is Holy Week, starting with Palm Sunday. Following the New Testament story, Jesus' crucifixion is commemorated on Good Friday, & at the beginning of the next week the joyful celebration of Easter Sunday recalls the Resurrection of Jesus Christ. In Lent, many Christians commit to fasting, as well as giving up certain luxuries in order to replicate the account of the sacrifice of Jesus Christ's journey into the desert for 40 days; this is known as one's Lenten sacrifice.