I never had Bunker Hill Day off when I lived and worked in Boston. But that's no reason not to celebrate today. Here are some, um, helpful Bunker Hill Day Celebration suggestions from eHow:
Attend one of the stirringly realistic battle re-enactments staged in Boston and environs. And imagine what it must have been like to be a farmer, tradesman, housewife or schoolchild with fighting raging round you, day in and day out.
I'm going to imagine being a farmer all day.