Complex sentence: The Winnipeg White Out is a hockey tradition that dates back to 1985 when hockey fans in Winnipeg were asked to wear white clothing to home playoff games in Winnipeg, creating a very intimidating effect and atmosphere.
Split into simpler sentences: The Winnipeg White Out is a hockey tradition that dates back to the late 80's. Hockey fans in Winnipeg would wear white clothing to home playoff games in Winnipeg, creating a very intimidating effect and atmosphere.