A sundial tells the time by the shadow of a rod, the gnomon. It needs no winding and no battery, only a clear day.
- Look where the shadow falls. The number closest to the tip of the shadow is the solar time.
- Remember it is "solar" time. Through the year it drifts a few minutes from your wristwatch, and an hour during daylight saving time.
- On a cloudy day, wait. Without sun there is no shadow, and the dial simply rests.
At the Time Workshop, every participant builds a sundial and takes it home.