Well we certainly have Fridays, about fifty-two of them every year, but none of them to my knowledge are black.
Black Friday (the day after thanksgiving) is the first big shopping day of the year in the United States, and it seems to make the news more and more every year.  In order to kick off the shopping season, most retailers have crazy sales that works up the general public into a shopping frenzy.  More recently, the Black Thursday flyers have been acquired early and posted on the internet for people to get prepared.  They line up outside locked doors all night so that they can be first in line to pick up that plasma TV for 90% off.
Here in Canada we have an equally puzzling day called Boxing Day, and it is the day after Christmas.  It’s origins somewhat unknown, it is now most famous as the biggest shopping day in Canada.  Retailers sell off excess inventory from the Christmas season, and the general hype looks alot like Black Friday.  The ads are all top-secret (and more likely to be kept as such so they don’t hurt the “real” Christmas sales), there are websites posting the flyers as soon as they get their hands on them, and there are people lining up outside the stores waiting to take home that plasma television for 90% off.
So while there won’t be any craziness north of the 49th parallel this weekend, don’t worry it’ll just take us another month or so to show everyone our crazy.