=‘So that... “also Lord of the Sabbath”’ (Matt 12:8|Mark 2:28|Luke 6:5)
John MacArthur - GTY Ministry - “Understanding the Sabbath” (video) & “Why Sunday Is the Lord's Day” (video)
As I find this two-sermon exposition by John MacArthur on why he believes Sunday is to be a Holy Day for Christians a succinct but comprehensive overview of the present (heralded) emblematic state of Sunday Sacredness arguments, I have chosen to address it head on for a response. This topic however can be more involved, and as somewhat of a background into this issue discussion, I, generally speaking, recommend these following more detailed resources:
-The pertinent, i.e. Sabbath Day/Commandment research works and seminar presentations of Samuele Bacchiocchi listed/referenced here.