Lunar New Year (celebrated in China and some other Asian countries) begins at the first new moon of the first lunar month. Filofaxes recognize the Lunar New Year -- but stealthily.
First, as shown here, moon phases are represented on diary pages by empty (full moon) or blacked-in (new moon) circles. This photo shows a day-per-page format, but the weekly diaries have the moon phases, too.
On the International Information page (the one that lists national currencies, time zones, and holidays), you can see which countries celebrate the holiday by looking for the new moon dates (in 2007, February 17 and 18). Looks like Hong Kong (HK), China (CN), Taiwan (ROC), and South Korea (ROK).
Brazil (BR) also lists February 17-21 as national holidays, but I suspect that has more to do with Carnaval than Lunar New Year.
My favorite part of Lunar New Year as it's celebrated in China? Many people get days or even weeks off from work in order to travel back to their old hometowns and celebrate the new year with relatives.