Indeed, but it didn't have enough IMDb voting counts to be included in the top 20. The cut off line was 2400 votes to fill 20 spots. Mother's Day has 2364 votes only
Like I said before, these polls are based on IMDb voting counts. Christmas Evil has 1705 IMDb votes. Not "popular" enough to crack the top 20.
1. The Fog 2. The Shining 3. Inferno 4. The Changeling 5. Motel Hell Bottom 5 1. Humanoids from the Deep 2. New Year's Evil 3. Mother's Day 4. Maniac 5. Fade to Black (which I didn't think was actually bad, just weak)