International Pillow Fight Day

Please note: This event has already occurred.
All the fun of beating up on your best friends in your childhood bedroom returns to the National Mall for another year. Except your friends have been replaced by well-meaning strangers, and the down pillows you favored back then are now of the hypoallergenic variety. (The organizers ask that you leave the feather pillows behind so as not to litter the Mall.) The battle is on from 3 to 5 p.m.