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.

How is unity preserved in the diversities of gifts?
Why did God destroy the antediluvian world?
What proves that the law is an undivided whole?
What similar charge was brought against the Apostle Paul?
18. Does Christ anywhere in the Scriptures ever claim any other day of the week than the seventh as His?
How perfect would God have us become?
Under what condition does the Lord not hear prayer?

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