did i miss the memo?

ok, more than half of my office is out right at this moment... no, it's not because it's lunch time - these workaholics NEVER leave their desks. they may not even go home at night. is there something i'm missing? like is there an unofficial holiday today? bubonic plague in the ventilation system that someone forgot to mention? what's the deal? i feel like the ultimate chump, sitting here (sort of) doing work...