This is a National Holiday on every June 23, where any Mercenary working for the Builders League United (BLU, a subsidiary of TF Industries) must succumb to a beating from anyone of any kind (Humans, Raccoons, Wizards, Books, Flying Eyeballs, etc.) Oh, and also they CANNOT fight back!
RED Merc: Hey pal! Guess what day it is!
BLU Merc: Uhm... What?!
RED Merc: It's Beat a BLU Mercenary Day, Chucklenuts!
*A long beating of the BLU Merc begins*