On what day was John in the Spirit?

Answer

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

Which day is the Sabbath?
What day is the Sabbath, \"according to the commandment\"?
Under what figure was the Christian church represented to the Apostle John?
When was the union of church and state formed from which the Papacy grew?
To whom was the book dedicated?
What is the next event mentioned in the prophecy?
What does He know and remember?

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