Thanks for the information on the digital sun dial. I first became interested in sun dial in 1959 when I went to the UC Berkeley campus. There is a large bell tower there, and on the south side of the tower is a sun dial. On the brass plate below, is a table of correction factors; when these are applied to the sundial reading, the time is accurate to within one minute.
In 1959 my MECHANICAL watch was not as accurate as the sundial! Timekeeping advances like the accutron tuning fork and the quartz electronic watches were still in the future. On a recent visit to Berkeley, I found that the sundial had been vandalized by revolutionary terrorist thugs who bent then shadow bar, and by the University itself who planted a grove of shade trees around it. Perhaps it is time for a new model with a large elevated hemispherical fish-eye lens to defeat the trees...
