PHILLY - Mar 28 - It turns out, the term "spring clean" doesn't apply only to the closet. The likelihood of divorce climbs in January and February, peaking in March, according to an analysis of Washington state divorce filings published by University of Washington researchers. And breakups, according to Facebook data analysts, tend to spike in the spring and again in the summer. There may be a biological basis to the idea that spring is the season of love, according to Helen Fisher, a biological anthropologist at the Kinsey Institute at Indiana University and Rutgers University's Center for Human Evolutionary Studies. "With more sunlight, people have more energy, more optimism, more interest in the future," she said. "If they look around their home and say, 'This isn't working,' perhaps this is the time they have the energy to do something about it."