Before each year we get a list of our early dismissals and days off. This year I was scanning through the paper when I began to notice that Wednesdays were quite popular. So I check the calendar with the sheet, and lo and behold: Every other wednesday is a half day. Now the district (as everyone in this area) is the California of the area. That is, broke as a dutchman straight off the ship.
So my best theory is that, in an effort to conserve energy, at 1:00 every other wednesday the power is shut off. You know, its either that or the faculty has a zamobny grand prix.