If it’s sunny out, you can see what time of day it is by looking at a sundial. I am sure there is a very complicated explanation for all this, but I just like to look at a sundial and know what time of day it is.
There are lovely sundials in many parts of the world.
A drawing of the sun and a sundial. The sun casts a shadow straight down at noon. In the morning, the shadow is left of the center. In the afternoon, the shadow is left of center.
The first three pictures are by John Carmichael. He made these sundials and then took pictures of them.
This sundial is in Colorado Springs in Colorado, US. It is the Chinook Trails Monumental Obelisk.