PogoPossum.com, the official website of the classic Walt Kelly comic strip, is celebrating its first anniversary of operation by presenting the original 1955 strips in which we learn of Churchy La Femme's inordinate fear of Friday the 13th, which is more or less lucky depending on what day of the week it falls on in a given month. (Yes, you read that right.) The site also tells us how Kelly came up with the idea:

Some time in 1955, Walt and Helen Kelly were dining in a favorite restaurant in Stamford, Connecticut with their children -- Kathy, Carolyn and Peter, as well as Kathy's thirteen year old friend, Janet Safarik.

As usual with Walt around, the conversation engaged everyone and covered many subjects. At one point, Janet -- in reply to something long forgotten -- stated, "Well! At least, Friday the Thirteenth falls on a Saturday this month!"

Walt's ears pricked up and his full attention went to Janet. He was delighted! They discussed her concept deeply for a few moments and Walt thoughtfully made some notes on a napkin.

In February 2005, Friday the 13th falls on a Sunday, and I don't remember whether that's lucky or not.