For your calendar this very month, you may favor Marvel's high kickin'est hero the Amazing Spider-Man from this Marvel 2010 calendar! It synchs up perfectly with 2021!
"Look at my crotch," Spidey says. "GO AHEAD TAKE A BIG STEAMING LOOK, GOBLIN!" he says.
from Marvel Calendar 2010 (Marvel, 2009) (Click picture to Great Pumpkin-size)
It's too late to buy a wall calendar for 2021, so if you're lackin' for something October to hang over the cracks, clip 'n' save this 1993 Marvel Age calendar! It works in 2021, too! and it has monsters on it!
Lemme go get my crayons, I'm gonna color 'em.
from Marvel Age #130 (November 1993), by Darren Auck