You certainly had an influence on the holidays! Remember, from We Three Kings:
"Myrh is mine, it's bitter perfume
Breathes a life of gathering gloom
Sorrowing, sighing, breathing, dying
Sealed in a stone cold tomb"
Of course, that is one of the few pieces of Christmas Carols that still truly reflect your glory. For example, few remember the original version of one song...
"Hark! the nameless cultists sing, "Glory to our dreaming King,
Deep beneath the ocean waves, dreaming in his watry grave.
Soon the stars will all be right, usher in eternal night!
When Cthulhu comes to reign, things here bouts wont be the same!"
Hark! the namesless cultists sing, "Glory to our dreaming King!" "
- Rei (Grand Low Priestess of Cthulhu's Womyn's Knitting Cirkle)