Using the sun to tell time is a very old trick, one that most folks don’t know how to do nowadays. An easy, and low tech, way is to use a Sundial Ring. The Sundial Ring ($23) is easy to use. Simply take the ring off of your finger and;
- Point the small hole on the ring towards the sun
- Calibrate for the month
- Calibrate for latitude
- The dot of light on the inside of the ring will tell you the time
Heck, even if you don’t want to wear a ring you could tie this onto your bug-out bag.