Today is the federal oberservance of Martin Luther King Jr.'s birthday.
Here's a run down of what's open/closed:
All municipal, state and federal offices and facilities will be closed. This includes schools and the post office.
All MBTA buses and trains will running on a reduced weekend/holiday schedule.
Liquor stores: Open at the owner's discretion.
Retail and convenience stores: Open at the owner's discretion.
Restaurants and bars: Most will be open, but call ahead. It's up to the owner.