WASHINGTON POST - Jan 3 - According to Match.com and POF, the window when the most people sign up, log on and poke around is January 4th. Dating sites see way more action between New Year’s and Valentine’s Day than they do any other time of the year. This cycle doesn’t just play out on dating sites. According to Facebook, people are far more likely to change their relationship status in January or February than they are at any other time of year. Offline, the holiday season tends to see a jump in both condom sales and conceptions.