[gmiller123456]

Just seeing the shortest shadow doesn't tell you anything. You need a way to correlate it to your position on Earth. Having a watch (set to a known time zone) only tells you what time it happened, which is also pretty useless. You need an almanac (or some computation) to correlate what time solar noon happened on a given day with your longitude.

[A484D424]

Lost my last account's login. I'd watch this, you only need to know solar noon in Greenwich and compare it to your own solar noon.

https://www.youtube.com/watch?v=b7yoXhbOQ3Y