Leap Year 2 3, 6:52am

@Eruanne

Thinking Al Capp probably borrowed this idea from the Irish and moved the day to November to Americanize it?

But it's still somewhat impressive that, from his comic, Sadie Hawkins Day became such a big deal across the US and Canada as well.

According to Wikipedia, Sadie Hawkins dances were held on February 29th as well:
https://en.wikipedia.org/wiki/Sadie_Hawkins_dance