This is federal jury duty, correct? DC Superior Court jury duty is still one day or one trial, as far as I know.
I had to do the two-week call-ins around Thanksgiving and never had to go in (this was U.S. District Court, not DC Superior Court). I may have lucked out due to it being around a major holiday, but I never had to go downtown once. It was kind of annoying because they would not give me a deferment -- they were only allowing medical deferments, with a doctor's note -- so we couldn't really travel for Thanksgiving. But still, nothing happened.