“On this day, Great Lent begins in the Eastern Orthodox Catholic Church; it always falls on the 7th Monday before Orthodox Easter. Also called Clean Monday or Pure Monday, this religious observance is a day of fasting and spiritual purification and reflection, similar to Ash Wednesday of the Western Church.
The first week of Great Lent is also called Pure Week. Great Lent lasts for 40 days and ends on Lazarus Saturday, the day before Orthodox Palm Sunday. The next week is Holy Week, and ends on Easter, the day of Christ’s resurrection.”