This hour is prayed early in the morning, and commemorates the Resurrection of the Lord (Psalm 62:1).
In this hour of the day, the Holy Spirit came down upon the Apostles as tongues of fire(Acts 2:15). At this hour also, Our Lord Jesus Christ was condemned.
In this hour, Our Lord Jesus Christ was crucified (John 19:14)
This hour commemorates the death of our Lord in the flesh upon the tree and the testimony of the thief at his right hand(Matthew 21:46)
Instituted to commemorate the removing of the body of the Lord Jesus Christ from the Cross. The wrapping of it in linen, and the annointing of it with sweet spices.
This hour commemorates the laying down of the body of Christ in the grave. It corresponds to the last hour of the day before retiring, since sleep is but a temporary death (Psalm 62:6)
This hour includes three services corresponding to the three times our Lord prayed in Gethsemane (Psalm 118:62)
The prayer of Veil is said daily in the monasteries, after the prayer of teh Twelfth Hour and before teh Prayer of Midnight. The present position of this Prayer after the Prayer of Midnight aims to facilitate the daily usage by laymen.