In these sermons Price shows how the teaching of the Lord Jesus Christ condemns all man-invented holy days.
Scripture and history are brought to bear most specifically on the celebration of Christ-mass, demonstrating why it is a sin to celebrate this day.
It is also noted that Scripture never commands the celebration of this day and that there is no evidence that Christ and the Apostles ever celebrated this day -- in fact, this syncretism of paganism and "Babylonian" Christianity was not first celebrated until 354 A.D. (when December 25 was chosen, in accord with the Pagan feast of Saturnalia, as the day of "celebration").
Price also clearly shows that to call yourself Reformed while you hold on to this Roman Catholic/Pagan monument of idolatry makes for a serious contradiction in your testimony -- as the best Reformed churches have always disciplined those (in accord with Scriptural teaching) who broke the second and fourth commandments by keeping antichristian festival days like Christ-mass, Easter, etc..
Citations from Luther, Calvin and the company of Geneva Pastors, the Church of Scotland's First Book of Discipline, the 1620 Dutch Synod, the Civil Government of Holland (1625), the British Colonies in the U.S. and the Westminster Assembly all speak with one voice against this Romish corruption.
Common objections against the classic Reformed position are also answered.