Context: Week 8 saw the Bears return to Soldier Field to play the San Francisco 49ers. Prior to the game, Lovie Smith announced that the Bears would don their alternative orange jerseys to commemorate the upcoming Halloween holiday, and asked Bear fans to wear orange clothing to create an "orange swarm" at Soldier Field. The Bears' 41 point first half tied the franchise record for most points scored in one half, the other game being the 1940 NFL Championship, where the Bears defeated the Washington Redskins 73-0.

Question: Why did the Bears wear orange jerseys?

Answer:
commemorate