Day, a retired IBM employee, was first elected to the Senate in 1990. He resigned as Senate Minority Leader at the conclusion of the 2004 session, but was convinced by the GOP caucus to return to the post.
Day, born in 1937, grew up in Rochester, the son of farmer-parents. He served on the Owatonna City Council and the Steele County Board.
He is married to Janet and has four children. He is Catholic.