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 writings are specifically mentioned as containing some things difficult to understand?
How did the people of Samaria publicly testify to their faith in the preaching of Philip?
By what should we test, or prove, all doctrine?
Whose voice had more weight with Saul than had the commandment of God?
What is set forth as the basis for hope and comfort?
How long is Satan to be imprisoned on this earth?
7. Near the close of the three and one-half years drought in Israel, brought about as a judgment did King Ahab bring against Elijah?

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