It depends on your latitude.
1600 hours
The okanagan receives over 2000 hours of sunshine every year.
2300 hours
there are 720 hours in the month of September
Spain has 14 hours of sun light
they usually just get 7 hours of sunlight a day
11 and a half some times more
depending on the time of the year and the place you live then usually around 10 hours.
Sorry, not enough information there. The hours of sunshine each day depend on two factors: 1: Time of year (you give that) 2: Proximity to the equator (that one is missing)
Greece experiences approximately 250 days of sunshine per year on average, making it a sunny destination for travelers.
There are 43848 hours between the two dates.
720