Daylight Hours Explorer
http://astro.unl.edu/classaction/animations/coordsmotion/daylighthoursexplorer.html

Shows the hours of daylight received during the year for an observer at a given latitude. This is an important factor contributing to the seasons. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog. This has been added to Astronomy Resources Subject Tracer™ Information Blog.