More notably, nobody gets the day off except D.C. government workers, who are but a blip in a workforce dominated by Federal and private-sector employees. I would conservatively venture to guess that 99.9% of those who need to work on April 16th have absolutely no clue they're doing so on a D.C. holiday.
While we may not like to admit it, everybody has a little schadenfreude in them; my daily dose comes from walking the streets around my office and seeing the ticketed cars belonging to those who feel they're above the law. My bonus comes when I see someone trying to negotiate with the DPW guy after he has started the ticketing process. Once it's printed...he's dead, Jim.
Look forward to next year's blurb on D.C. Emancipation Day. But for now you'll have to mark your own 2009 calendar to remind you, as I won't until it's over.