Acts 20: 7 And upon the first day of the week, when the disciples came together to break bread, Paul preached unto them, ready to depart on the morrow; and continued his speech until midnight.
The brother we used for reference purposes earlier may see something dangerous in what we are doing, by preaching on Sunday, but it may a be taboo that is driving his thoughts, and his actions. And again, we would have to rebuke him gently by saying; Why are you so disobedient my brother? Did you read anywhere in the Bible where God forbids a preacher from preaching on Sunday? The Lord tells us to preach the word, in season and out of season, and on any day of the week, as The Holy Spirit will guide.
[Last Day Events pp 140] Sunday can be used for carrying forward various lines of work that will accomplish much for the Lord. On this day open-air meetings and cottage meetings can be held. House-to-house work can be done. Whenever it is possible, let religious services be held on Sunday. Make these meetings intensely interesting. Sing genuine revival hymns, and speak with power and assurance of the Savior's love.
Taboo [3] The keeping of the Seventh day Sabbath is not a winning ticket to heaven, all by itself. The faith of Jesus has to be included because the Sabbath day does not save anyone. It never has, and it never will, for salvation comes through Jesus Christ alone. Even though the seventh day Sabbath is the point of faith especially controverted by the man of sin, and also by apostate Protestantism, the keeping of the Sabbath, all by itself, without Jesus in the midst, will never save a single soul.
John 14: 6 Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.
May The Lord add His blessing to the study of His word. God bless!