On what day does John say he was in the Spirit?

Answer

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

What was predicted of Christ's preaching?
How do the children of God walk?
How will such a mother he regarded?
What was to be the nature of the next kingdom after Babylon?
To whom does the Sabbath belong?
What name is given to the second state of the church?
Concerning what have we been definitely informed?

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