The true meaning of IsItChristmas is about bringing pure binary joy to millions. Don't be a little adsense grinch.<p>...How about selling a nice IsItChristmas wall-clock? Completely dormant for 364 days a year. But on that one day, something more magical than you could ever imagine...
Make it part of the "is it <some holiday>" network. Everday, I'd like to figure out if it's a holiday by deduction... so that's a lot of traffic for you.<p>Make an API for it, and charge.