We have a date! (Kind of!) D.C. Schools Chancellor Michelle Rhee and Sacramento Mayor Kevin Johnson have been extra-tight-lipped about the details of their upcoming nuptials, but the groom-to-be spilled some of the beans to Sacramento news station KCRA. Johnson said that the wedding would be held on Labor Day weekend, which, of course, is the first weekend in September. Johnson also leaked the details on Rhee’s wedding gown — she’ll be wearing Monique Lhuillier, a Los Angeles-based designer who has also done work for Carrie Underwood, Britney Spears and Al Gore’s daughter, Sara.