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DanFlag for United States of America

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Does anyone know of any other webservices that return sunset times?

I'm already aware of the following:

http://www.earthtools.org/webservices.htm#sun
This is a good one and does what we need but we will likely exceed their usage restrictions

http://developer.yahoo.com/weather/
this just gives the sunset time for the current day ...

Weather.com
this is where yahoo gets their data.  They provide the needed for up to 5 days ahead which is great.  But they want 5 promotional links with each call ...

Are there any others out there?
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jermorse

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One more thing if you can't find a web API that goes more than 5 days in advance there must still be another method you could implement with the algorithm using the lat/long etc.. Just not web based.

Can't this be calculated for hundreds of years in advanced? I know that astronomy tools like Starry Night do this also.

http://www.starrynightstore.com/
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Thanks ... I found a page that has a pretty simple calculation for this that I'm likely going to use in place of a webservice:

http://bodmas.org/kepler/js_sunrise_moonrise.html