Halloween is Grinch Night (1977)

I first caught this on TV sometime in the 1980s. The residents of Whoville "can tell by the smell of the wind" that another Grinch Night is on its way! This cartoon is not as endearing as How the Grinch Stole Christmas, and not much actually happens in the story. However, it is still entertaining and well-drawn. I found the scene where the boy, Euchariah, encounters the Grinch's nightmarish collection of monsters to be quite creepy. This cartoon originally aired 29 October 1977.