Sunrise/Set Calculator calculates sunrise,sunset, and civil twilight for any place on earth. Netscape 3.0 or later is required.
You can enter decimal degrees instead of degrees, minutes, seconds for latitude and longitude by entering the value in the degrees field and by leaving the hours and seconds fields empty.
The form is preloaded with data for State College, PA USA (40.50N, 77.5W) but it can be changed for any location.