1:10
They may claim to have done so and the Adventists accept the claim , it appears , but the early Christians kept the first day of the week Sunday , long before there was any Roman Catholic Church or any pope at Rome . Adventists twist history here just like they twist the Scriptures . '' `` Listen here , dear , '' continued Robert . '' ` I was in the Spirit on the Lord 's Day ' -LRB- Rev. 1:10 -RRB- . What day was the Lord 's Day ? It was not Saturday , the Sabbath . Pentecost , that grand birthday of the church , was on Sunday -LRB- Acts 2:1-4 -RRB- .