Check if DST is set for specific date and time

i am trying to check, with plain c, whether the DST is set on a specific date and time. i have tested gmtime and localtime, but these functions only take care of the current system DST.

Thanks f开发者_JAVA技巧or your advice. thomas

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Try to use zic and zdump. Use man for more information.

When I needed to know DST without holding the 6MB of compiled data I modified zic's code to create a samller table with the required data.