A day you get off of school because it's so cold that melted snow/rain turns into ice and its too dangerous to drive/ run the busses. It's common in Chicago suburbs.
-phone rings-
alex: "dudee why the hell are you calling me so early?!"
A van that, from a distance, looks like an ice cream truck filled with loads of delicious goodies. Upon closer inspection, however, it ends up seeming rather shady. Shady enough for an adult not to allow desperate children to go up to the van. The first sign is a lack of windows, then a driver with a pedosmile and/or melestache.
The fake-outs are often mistaken for the trucks, and any idiot can tell there is clearly a pedo inside.
Timmy: OH BOY!! An ice cream truck! I want a Spongebob Popsicle!
Mom: Well, if you really want to go Timmy... WAIT! Sorry, Timmy. We can't go.
Timmy: But you said...
Mom: I'm pretty sure it's an ice cream van. You'll learn about it when you're older