A working version of this page is deployed here:
http://www.starchamber.com/sunset
This is a file for determining what the time of sunset will be doing for the next several days.
- Sunset algorithm is courtesy of http://prestonhunt.com/story/124
- Hunt did a Javascript implementation of the algorithm found at http://williams.best.vwh.net/sunrise_sunset_algorithm.htm
Here is a minor edit.