In The Golden Age (March/April 1935) dear old Clayton Woodworth published a three-part article claiming the calendar was the work of the devil. His solution: a new "theocratic" calendar replacing the names of all the days of the week (drawn, naturally, from pagan gods) to new ones: Lightday, Heavenday, Earthday, Starday, Lifeday, Mansday and Godsday.
The months of the year were also renamed in a calendar that started the year in the (northern) spring. Those months would be called Redemption, Life, Visitment, Freedom, Vindication, Hope, King, Peace, Order, Logos, Jehovah and Temple.
Since Woodworth was part of the faithful slave class and therefore in direct receipt of God's new light, it's odd that it was never adopted. In the end, I guess they just decided to compromise with Satan's world for the sake of convenience.