Not a dumb question at all. In fact it’s very interesting. Since the sun is below the equator for half the year (Sept 21 to March 21) the shadow on a dial at the equator will be cast to the north and the dial goes clockwise. The other half of the year (March 21 to Sept 21) the sun is north of the equator and the shadow is cast on the south side of the dial. During this part of the year the shadow moves counter clockwise. On the equinoxes (March and Sept 21) when the sun is exactly ON the equator, the shadow moves from west to east, straight across the dial neither clockwise or counter clockwise.

Ron