On: every psalm and song in the daily prayers uses today’s English. Off: all of them use the older “thee and thou”. Until you choose, the Songs of Zechariah, Mary and Simeon use today’s English, as most churches sing them. The Lord’s Prayer and the prayers for the dying show the form most people learned.
“Holy, holy, holy.” Sung before the eucharistic prayer, joining Isaiah's vision of God enthroned in glory (Isaiah 6:3) to the people's welcome of Christ at Jerusalem (Psalm 118:26; Matthew 21:9).
In Worship — The liturgy, the daily office, and the furniture of a service.