Night Time Calculation

[novice1]

Can someone explain to me if its possible to calculate the amount of night time spent traveling from point A to Point B using the location's LAT/LONG coordinates and time?

ex: if I start from Point A (i.e. 1600) and arrive at point B at (i.e. 2200), how to calculate the amount of night time spent traveling at night?

 

[Sandeep Warrier]

What do you mean by Night Time? Does it begin after 1800 hrs or after 2000 hrs? If you define that it would be helpful.

 

[novice1]

night - end of evening civil twlight to morning of civil twilight

Basically, 1 hour after the sun sets til 1 hour before the sun rises