Stockwell Burt Day Jr., PC is a Canadian former politician, and a member of the Conservative Party of Canada. He is a former cabinet minister in Alberta, who later served as leader of the Canadian Alliance from 2000-01. Day was MP for the riding of Okanagan—Coquihalla in British Columbia and the president of the Treasury Board. He was widely seen as a prominent voice for social conservatives within the Conservative Party. On March 12, 2011, Day announced that he would not be seeking re-election in the 2011 federal election.