Et Tu, Brute?
I find it rather ironic that a day that tends to be a metaphor for impending doom precedes a day that we have come to fill with drunken debauchery and rousing good times.
Of course, one could argue that they are completely unrelated, particularly when you look at which came first.
Even so, it's something to be aware of.
Have a safe weekend (we're under a tornado warning now and the storm is starting to pick up) and a Happy (but safe) St. Patrick's Day.