Why is sunset time different in north and south like in pennsylvania and florida?

The farther you get from the equator and the closer you get to the poles, the more sunlight you rotate through around the summer solstice and the more darkness you rotate through around the winter solstice. For example, New York City has about 15 hours of sunlight on the summer solstice and about 9 hours on the winter solstice. Jacksonville has about 14 hours of sunlight on the summer solstice and about 10 hours on the winter solstice.