Didn't know which forum to put this in.
I found it while trying to work out some log book times for logging night.
http://www.fv01.dial.pipex.com/suntimes.shtml
Does an awful lot more than sunrise and sunset.
I will admit i have also posted it in Private flyers forum for ppl to workout sunrise and sunset.
But thought it might be quite usefull and interesting to folk that don't still have avgas in thier blood.