Sundial of Guitiriz

The Guitiriz is an unusual sundial, a unique piece of work in Galicia. I'm going to explain its operation: a sundial uses the shadow cast by an object on a level surface with a shadow. The scale indicates the time. First you have to put on the graph, in figure 8, that reflects the sun's position in the sky every day of the year, always watching from the same position and time, and the date corresponding to the day and month of today. Secondly, make a shadow on the scale. To do this, you have to remember that daylight does not match the official time and you have to make a correction for this. This