With his parents managing a chalet at Charlotte Pass in the Snowy Mountains of New South Wales it was only natural that Bill Day would become a champion Alpine skier. Day was only 13-years-old when he competed at the 1948 national championships before winning the slalom at the NSW championships the following year. In 1951 he represented Australia at the Inter-Dominion Championships, a skiing competition between teams from Australia and New Zealand. He then won an Olympic qualification event, earning himself a place on the team for the 1952 Oslo Games. The Oslo Olympics were the first time that Day had competed for Australia overseas, with him starting in the downhill, slalom, and giant slalom. Back home he won multiple national titles, finished on the podium at the Inter-Dominion Championships, and was selected to compete at the Olympics two more times. Day’s best result at the Games came in 1960 in Squaw Valley when he finished 41st in the giant slalom. Following his retirement from skiing he worked on a cattle station in the small town of Talbingo near to the edge of the Snowy Mountains.