Triodion

• the Pre-Lenten period, begins with a week in which there is no fasting, including on Wednesdays and Fridays, which are normally kept as fast days throughout the year.
• The following week is called the Apókreō in Greek. It coincides with the Carnival celebrations which, although officially discouraged by the Church as pagan remnants, are very popular. The Apokreo marks the change of diet to the fasting practice of Lent: meat is no longer eaten after the "First Apokreo Sunday", while for the following week, the Tyrinĕ, that culminates on Tyrinē Sunday just before Clean Monday, milk and dairy products, but not meat or eggs, may be eaten.
• the Forty Days of Great Lent itself, which begin on Clean Monday and for which a vegan type diet, with the addition that on many days the use of oil is excluded as well. On two specific feasts during Lent, fish is allowed. The fast is prescribed until Easter. This period coincides with the springtime birth of new lambs.
• Lazarus Saturday and Palm Sunday
• Great and Holy Week