For those who have neve watched Futurama before. Freedom day is the one day of the year where everyone on Earth can do whatever the hell they want without fear of any consequence whether social or enforced by law.
Personally I would celebrate by throwing a naked hot tub orgy and then set a...
any interior car shop should be able to fix you up with some, or if the harness for the vents is not destroyed, try going to a junk yard (I would send the bill to mr. temper)