Sadie Hawkins Day...

[PapaBear]

Today is Sadie Hawkins Day. All you single guys watch your behinds. Those single ladies are out to get you!

[Jenna]

In the Li'l Abner comic strip, Sadie Hawkins was the daughter of one of Dogpatch's earliest settlers, Hekzebiah Hawkins. When she reached the age of 35, still a spinster, her father in desperation called together the eligible bachelors of Dogpatch and declared that day to be Sadie Hawkins Day and that "when ah fires [my gun] all o' yo' kin start a-runnin! When ah fires agin - after givin' yo' a fair start - Sadie starts a runnin'. Th' one she ketches'll be her husband."
The town spinsters decided that this was such a good idea, they made Sadie Hawkins Day an annual event, much to the chagrin of Dogpatch bachelors everywhere. (See leap year for discussion of a similar tradition, where women propose marriage to men -- rather than the reverse, as is conventional in western culture -- on February 29.)
Sadie Hawkins Day was first mentioned in the November 13, 1937 Li'l Abner strip with the race actually taking place between the November 19th and November 30th strips. It would prove to be an annual event in the strip.[1]

http://en.wikipedia.org/wiki/Sadie_Hawkins_Day

1937 was only 17 years after American women got the right to vote. What a different world it was then!