Another more detailed example

Now I am going to give you another example with more details (for easier understanding we convert the time span into seconds. For quicker results you can eliminate the seconds and convert the hours into minutes but then the calculations will be less precise.

Tuesday 8 Mai 2001 at Bordeaux (France), the sun rose at 4 h 43 m 53 s AM and set at 7 h 1 m 24 s PM.

Sunrise: 17015 s
Sunset: 69264 s
Duration of the day: 69264 s-17015 s=52249 s (14 h 30 m 49 s)
So each unequal hour of the day lasts for: 52249 s:12=4354 s (1 h 12 m 34 s).


Let us now count the duration of the magic night:, knowing that 24 hours equals 86400 s: 86400 s-52249 s=34151 s (9 h 29 m 11 s).
Each unequal hour of the night will last: 34151 s:12=2846 s (47m 26 s).