This December, consider - to the Lord - not celebrating Christmas.
Romans 14:6 He that regardeth the day, regardeth it unto the Lord; and he that regardeth not the day, to the Lord he doth not regard it. He that eateth, eateth to the Lord, for he giveth God thanks; and he that eateth not, to the Lord he eateth not, and giveth God thanks.
Colosians 3:23 And whatsoever ye do, do it heartily, as to the Lord, and not unto men;
Here's some sermon audio as to some reasons why it may be honoring to God to abstain from celebrating Christmas this year. (link)
But, if you are going to celebrate it, do so to the Lord, without (as the papists attempt) making it an obligation on your Christian brethren.
Romans 14:10 But why dost thou judge thy brother? or why dost thou set at nought thy brother? for we shall all stand before the judgment seat of Christ.
P.S. Here's an interesting counterpoint to my position (link).
P.P.S. Here's a more interesting (in my opinion) counter to the counter-point (link).