“Large, garden variety sundial. To use, align it towards true north and hope for clear skies (for instructions on finding true north, see: http://www.princeton.edu/~oa/manual/mapcompass2.shtml). Inspired by/remixed from this great Instructables project: http://www.instructables.com/id/Sundial-Watch-3D-Printing/step6/The-Classic/ More info on sundials: https://en.wikipedia.org/wiki/Sundial”