The Lord s Day! Is it Saturday? Or Sunday? Or is it The Great and Terrible Day of the Lord spoken of by the Prophets? These are important questions, for this expression opens the Book of Revelation, and how we understand it will determine where, in time, we place the action in the rest of Revelation. This publication combines all that Bullinger wrote on The Lord s Day and Revelation 1:10 in his magazine Things to Come and in his books.