source: http://www.survivaldump.com/how-to-estimate-remaining-daylight/
I found this interesting for wilderness survival and basic skills if you get stuck out in the wild. Thought I should share. Anything know how accurate this may be?
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A decent guide on how to roughly tell what time it is.
The sun travels its own diameter every four minutes. (It is half a degree wide. Same as the moon.)
Is it time to stop and scrounge for shelter, or is it better to keep on trekking? Use this simple trick to measure the remaining daylight. Remember to allow yourself at least two hours to setup camp before the sun goes down.
Count the finger widths between the sun and the horizon. Each finger is equivalent to fifteen minutes with each had totaling an hour. When the sun dips low enough that only two hands fit, its time to search for a suitable campsite and assemble a shelter. (A caveat: if you’re near the poles, the sun will hover over the horizon for a longer period of time, giving you an inaccurate reading).
http://www.survivaldump.com/wp-content/uploads/2014/03/sunlight.gif