1. On a sunny day, go outside with a compass, pencil, and print-out of the Sun Clock Diagram . Put your compass on the ground and turn it so that the arrow and the " N " (for "North") line up. Or use your phone (the iPhone compass points to Magnetic North like a common compass, but you can set it to true north with a toggle. If you use true north, you can ignore all the adjustments below.. 2. Follow the directions on the Sun Clock Diagram to find out how to line up the Sun Clock with your compass. Once you have the Sun Clock pointed in the right direction, you can figure out what time it is