How long does it take for the sun to go down? Here's the truck that gives you the answer

If you are already on vacation and you have to calculate how long the sun needs to go down, follow this simple action to get the answer.
Keep your fingers and put your hand in order for the sun to "stand" on your index finger. Now count the number of fingers in the line of the horizon. Each finger represents about 15 minutes until sunset.

Share this trick with others as well. The picture will help you with the exact position of the hand.