A few years ago, around this time of year, I had the following exchange at work with "Lindsay":
Lindsay: [Visibly baffled] "Ummm, I think that there's something ... I mean ..."
Phil: "Pardon me?"
Lindsay: "Do you know that you have like dirt or someting on your head?"
Phil: "Unh hunh. Sure. Those are ashes. Today is Ash Wednesday. The ashes used to be in the shape of a cross until I accidentally smudged them."
Lindsay: "Wow. Oh yeah. I think I've heard of that."