Clean Monday (Καθαρά Δευτέρα - Kathara Deftera) is the first day of Great Lent throughout Eastern Christianity. The common term for this day, "Clean Monday", refers to the leaving behind of sinful attitudes and non-fasting foods. Liturgically, Clean Monday—and thus Lent itself—begins on the preceding (Sunday) night,[3] at a special service called Forgiveness Vespers, which culminates with the Ceremony of Mutual Forgiveness, at which all present will bow down before one another and ask forgiveness. In this way, the faithful begin Lent with a clean conscience, with forgiveness, and with renewed Christian love. The entire first week of Great Lent is often referred to as "Clean Week", and it is customary to go to Confession during this week, and to clean the house thoroughly. The theme of Clean Monday is set by the Old Testament reading, Isaiah 1:1–20, which says, in part: "Wash yourselves and ye shall be clean; put away the wicked ways from your souls before Mine eyes; cease to do evil; learn to do well. Seek judgment, relieve the oppressed, consider the fatherless, and plead for the widow. Come then, and let us reason together, saith the Lord: Though your sins be as scarlet, I will make them white as snow; and though they be red like crimson, I will make them white as wool" (vv. 16–18). Clean Monday is a public holiday in Greece celebrated with outdoor excursions which include the widespread custom of flying kites to celebrate how light one's soul feels after forgiving those around you and having asked for and been granted forgiveness from them as well.