Yeah, you might be a Jehovah's Witnesss:
If someone says "bless you" after you sneeze, you inform them that it's based on fear of demons not done by true Christians
If someone wishes you Merry Christmas, you grit your teeth and refuse to respond.
If someone makes a toast you refuse to join, making everyone else uncomfortable.
You will eat birthday cake, but only the day after the party.
You buy Halloween candy the day after Halloween.