On what day was John in the Spirit?

Answer

"I was in the Spirit on the Lord's day." Rev. 1: 10.

What prophetic declaration foretold this truth?
What apostasy from the worship of God is named in this message?
How did God reprove their disobedience?
What does He say He will bring with Him when He comes?
When will this resurrection of the saints take place?
By what title does the Psalmist address God?
How will the ransomed of the Lord return to Zion?

Questions & Answers are from the book Bible Readings for the Home Circle