Dear San Francisco Unified,
Ouch! Surely there have been far worse hits to ADA cash, but this is pretty ugly.
My suggestion? If this were to happen again, the District office should remember that instruction on Halloween is limited at elementary schools anyway (whether you embrace the holiday or demand fealty to the daily schedule, costume hysteria eats time) and move an existing furlough day.
This will additionally gain the goodwill of baseball-loving teachers, who will not be irked that the people at the central office, who can already use the restroom whenever they like, also got to take in some parade on their lunch breaks.