[AstroPy] Determining DST in Python?

[Wayne Watson]

I'm trying to adjust a years worth of date-time stamps to UTC, and would 
like to determine where DST starts and finishes in years from about 2006 
to 2009. Is there an "easy" way to do this? 

-- 
           Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

             (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
              Obz Site:  39° 15' 7" N, 121° 2' 32" W, 2700 feet  
                
              "We're leaving you with a world that runs like
               clockwork. And the clock it runs like is a cuckoo
               clock." -- Frank Oppenheimer, physicist
 
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