And you know how easy it is to find out how much time is left until the sun opens behind the horizon and starts to darken. It does not matter whether you are on a hike or just relaxing somewhere in nature, it is advisable to prepare in advance for the night. There is a very simple way to determine the time to sunset, and for this you will need only your hand. So all you have to do is stretch out your hand so that the sun's on your index finger. Now we count the number of fingers to the horizon. If you have more or less standard finger thickness, then each finger will be approximately 15 minutes before sunset. With fingers of a completely non-standard size, you can advise to conduct an experience once, noticing the time that is necessary for the sun to drop 1 finger down.

Source: https://i-fakt.ru