I've posted this several times in years past as Halloween has approached. It contradicts the mythology about Druids:
As Halloween approaches it is useful for the more excitable among us to be reminded that the Evil One has already been defeated. From "Concerning Halloween" by James B. Jordan:
.... "Halloween" is simply a contraction for All Hallows’ Eve. The word "hallow" means "saint," in that "hallow" is just an alternative form of the word "holy" ("hallowed be Thy name"). All Saints’ Day is November 1. It is the celebration of the victory of the saints in union with Christ. The observance of various celebrations of All Saints arose in the late 300s, and these were united and fixed on November 1 in the late 700s. The origin of All Saints Day and of All Saints Eve in Mediterranean Christianity had nothing to do with Celtic Druidism or the Church’s fight against Druidism (assuming there ever even was any such thing as Druidism, which is actually a myth concocted in the 19th century by neo-pagans.) ....Biblical Horizons » Concerning Halloween
The Biblical day begins in the preceding evening, and thus in the Church calendar, the eve of a day is the actual beginning of the festive day. [emphasis added] Christmas Eve is most familiar to us, but there is also the Vigil of Holy Saturday that precedes Easter Morn. Similarly, All Saints’ Eve precedes All Saints’ Day.
The concept, as dramatized in Christian custom, is quite simple: On October 31, the demonic realm tries one last time to achieve victory, but is banished by the joy of the Kingdom.
What is the means by which the demonic realm is vanquished? In a word: mockery. Satan’s great sin (and our great sin) is pride. Thus, to drive Satan from us we ridicule him. This is why the custom arose of portraying Satan in a ridiculous red suit with horns and a tail. Nobody thinks the devil really looks like this; the Bible teaches that he is the fallen Arch-Cherub. Rather, the idea is to ridicule him because he has lost the battle with Jesus and he no longer has power over us. ....
Similarly, on All Hallows’ Eve (Hallow-Even – Hallow-E’en – Halloween), the custom arose of mocking the demonic realm by dressing children in costumes. Because the power of Satan has been broken once and for all, our children can mock him by dressing up like ghosts, goblins, and witches. The fact that we can dress our children this way shows our supreme confidence in the utter defeat of Satan by Jesus Christ – we have NO FEAR! .... [more]