On what day was John in the Spirit?

Answer

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

How does Paul speak of the resurrection of Christ?
What did the prophet see in this vision?
What besides creation were Israel to remember when they kept the Sabbath?
Do Protestant writers acknowledge the same?
Still bent on persecution, how does Satan manifest his enmity against the remnant church?
By what have these things been revealed to us?
Who has everlasting life?

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