[AstroPy] Determining DST in Python?

Wayne Watson sierra_mtnview@sbcglobal....
Tue Dec 29 20:49:37 CST 2009


This should do it for now.
2010     March 14     November 07     March 28     October 31
Sunday, March    8, 2009 at 2:00:00 AM
Sunday, November 1, 2009 at 2:00:00 AM
In 2008, daylight time begins on March 9 and ends on November 2.
In 2007, daylight time begins on March 11 and ends on November 4.New Law

NASA has a nice site all the way out to 2015 
<http://eclipse.gsfc.nasa.gov/SEhelp/daylightsaving.html>.

Wayne Watson wrote:
> Yes, I've begun to prowl around in that murky library.  It has just a 
> bit too much to 'easily' digest at the moment. I have used several of 
> the functions.  I would  think that someone has faced this issue 
> before.  For the moment, the best I can think of is hard coding 
> dates-times for my time zone in each of the last 3 years. I think there 
> really only four, 2 for the past year, and 2 for prior years. I really 
> only need to worry about my particularly time zone, Calif.
>
> Anne Archibald wrote:
>   
>> 2009/12/29 Wayne Watson <sierra_mtnview@sbcglobal.net>:
>>   
>>     
>>> 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?
>>>     
>>>       
>> You can almost certainly do this with the standard library's datetime module:
>> http://docs.python.org/library/datetime.html
>>
>> Anne
>>
>>   
>>     
>>> --
>>>           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
>>>
>>>                    Web Page: <www.speckledwithstars.net/>
>>>
>>> _______________________________________________
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>>>
>>>     
>>>       
>>   
>>     
>
>   

-- 
           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
 
                    Web Page: <www.speckledwithstars.net/>



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