How many times does The Lord's Day appear in the Bible?

Answer 1

ONCE -- [Rev.1:10]:

"I was in the Spirit on the LORD's Day, and I heard a loud voice behind me, like a Trumpet." (MNT] Montgomery New Testament

Same verse - [WEY] Weymouth's New Testament: "In the Spirit I found myself present on the Day of the LORD, and I heard behind me a loud voice which resembled the blast of a trumpet."

[NLT] New Living Translation: "It was the LORD's Day, and I was worshiping in the Spirit. Suddenly, I heard a loud voice behind me, a voice that sounded like a trumpet blast."