The Feast of the Transfiguration of Our Lord
The Feast of the Transfiguration of Our Lord, God and Savior Jesus Christ is celebrated each year on August 6. The feast commemorates the transfiguration or metamorphosis of Christ on Mount Tabor, when our Lord appeared in His divine glory before the Apostles Peter, James, and John.
The event of the Transfiguration is recorded in three of the four Gospels:Matthew 17:1-9, Mark 9:2-8, and Luke 9:28-36. Jesus took the Apostles Peter, James, and John with Him up upon a mountain, and while they were on the mountain Jesus was transfigured. His face shone like the sun, and His garments became glistening white.
Moses and Elijah appeared with Christ, talking to Him. Peter declared how good it was for them to be there and expressed the desire to build three booths for Moses, Elijah, and Christ. This reference to the booths could imply that this occurred during the time of the Feast of Tabernacles when the Jews would be camping out in the fields for the grape harvest; for this Feast had acquired other associations in the course of its history, including the memory of the wanderings in the wilderness recorded in the Old Testament book of Exodus.
While Peter was speaking, a bright cloud overshadowed them. A voice came from the cloud saying, "This is my beloved Son, with whom I am well pleased; listen to Him." When the disciples heard this they fell on their faces filled with awe. Jesus came to them and told them to not be afraid. When the three looked up they saw only Jesus.
As Jesus and His disciples came down the mountain, He told them not to speak of what they had seen until He had risen from the dead.
Orthodox Christian Celebration of the Feast of the Transfiguration
This Feast of our Lord is celebrated with the Divine Liturgy of Saint John Chrysostom, which is conducted on the day of the feast and preceded by the Matins service. A Great Vespers is conducted on the evening before the day of the feast. Scripture readings for the Feast of the Transfiguration are the following: At Vespers: Exodus 24:12-18, 33:11-23, 34:4-6, 8; I Kings 19:3-9, 11-13, 15-16. At the Orthros (Matins): Luke 9:28-36. At the Divine Liturgy: II Peter 1:10-19; Matthew 17:1-9.
Apolytikion (Grave Tone)
You were transfigured on the Mount, Christ God revealing Your glory to Your disciples, insofar as they could comprehend. Illuminate us sinners also with Your everlasting light, through the intercessions of the Theotokos. Giver of light, glory to You.
Kontakion (Grave Tone)
You were transfigured upon the mount, O Christ our God, and Your disciples, insofar as they could bear, beheld Your glory. Thus, when they see You crucified, they may understand Your voluntary passion, and proclaim to the world that You are truly the effulgence of the Father.
Transfiguration of Our Lord from the Greek Orthodox Archdiocese of America website: https://www.goarch.org/transfiguration