Show duration of time periods in detailed information box
It takes a while to substract two time values to see, in example, the duration of daylight period, so it will be useful to show it somehow in detailed information box
Places where we have Polar nights, showing the total duration time from dawn to dusk is also important!
This could be showed also in graphical circle (see my suggestion "blue lines"
Total times could be showed above the slider, just above text "12:00"
A) Total time from sunrise to sunset
B) Total time from dawn to dusk (important above arctic circle during the polar nights !)
SunCalc
All the ideas and discussions