“The New Testament plainly discourages the attempt to fill up the calendar with holidays. Gal. iv. 9-11; Col. ii. 16-23. Even days of fasting or thanksgiving are not holy days; but they are a part of secular time voluntarily devoted to God’s service. And if we are to perform these things at all, we must take some time for them. Yet none but God can sanctify a day so as to make it holy. The attempt to do this was one of the sins of Jeroboam. 1 Kings xii. 33.” — William S. Plumer, The Law of God, as Contained in the Ten Commandments, Explained and Enforced (1864), p. 325