My mom has been married to my dad for well over half her life. (Okay, not dramatically so, but she's been in the "married half my life" camp for more than 3 years now.) Earlier today we were wondering how long it'll be till Dad reaches the halfway mark. (He's almost 4 years older, the cradle-robber. :))
So, of course, being the weirdly geeky people that we are, we sat down and calculated that my dad's married life will equal his single life on January 30, 2010. This bit of random information has been noted for posterity.