A clock comprising: a housing; a first face located on the housing; a front end, adjacent to the first face; a second face located on the housing and adjacent to the front end; a first time display located on the first face; a second time display located on the second face; a single control unit located in the housing, and in signal communication with the first time display and second time display; an angle α, defining the angle between the first face and the second face, and where the angle α is greater than 0 and less than 180.