pninah,
I do believe you will find the prohibition of xians taking our holy days and celebrating them with a "new twist" in the Decalogue. You shall not commit adultery. Adulterate is the verb form of the noun adultery, and it means to mix a foreign substance into a pure or properly prepared substance...to change the original form by mixing in or adding to it some foreign substance.

Hope that helps.

*** thanks!! hopefully the xians on this board and other xians boards who want to commit adultery with that which is holy will read this. they need to stop mixing their foreign substance with that which is pure.