Routine to work out if today is a trading day on the NYSE?

Does anyone know of a routine that works out if today is a trading day on the NYSE?

I could hand-code the values, but I want something solid that will last a long t开发者_StackOverflow社区ime.

There is a routine in Matlab, but I'd rather not have to install 100MB of Matlab runtimes and a C#-to-Matlab bridge.

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Ask your broker. My data feed gives me the trading hours for the next few days for all exchanges I subscribe to on a daily basis.

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If you have a routine, and want to unit test it, the trading days for the NYSE are listed from 1885 to 2010 here:

http://www.chronos-st.org/NYSE_Observed_Holidays-1885-Present.html

Edit: Page disappeared, see here:

https://web.archive.org/web/2019*/http://chronos-st.org/NYSE_Observed_Holidays-1885-Present.html