ONCE A YEAR, MCDONALD'S CELEBRATES MCHAPPY DAY, WHEN ALL SALES OF THEIR MOST FAMOUS BURGER (THE BIG MAC) ARE DONATED TO A FOUNDATION THAT HELPS THOUSANDS OF CHILDREN WITH CANCER. SO WE DECIDED TO CALL FOR A TRUCE WITH BURGER KING, THEIR MAJOR COMPETITOR, ASKING ALL THEIR CUSTOMERS TO GO BUY A BURGER FROM THE COMPETITION.