The NIST web page at http://nist.time.gov is rather complex. It appears to use 
the discontinued OpenLaszlo[1] programming techniques. As far as I can tell, 
the determination of the time zone and Earth image are all done using 
javascript in your browser. So the solution of your issue is probably going to 
be closing your browser and re-opening at NIST page. If that fails, you may 
need to clear your browser cache.
 
The web page uses a bit of javascript in the HTML page itself, with an 
additional long javascript library file which is downloaded to your browser. If 
you are using Firefox, see the HTML code at:
view-source:http://nist.time.gov/
 
With any browser, see the javascript library code at:
http://nist.time.gov/nist_time.lzx.js
 
Your browser reveals the timezone you are in to the javascript code
running in your browser, and this local code determines the daylight
saving time status and timezone.
 
In addition, the javascript code running in your browser actually solves 
Kepler's equation to get the ecliptic latitude and longitude, then converts 
this to equatorial latitude and longitude. These values are used to select a 
xearth image[2] from a NIST server. The image shows the illumination of the 
Earth at various points in the Earth's orbit and rotation (time). For example:
http://www.time.gov/images/xearths/1S/96S.jpg
http://www.time.gov/images/xearths/23N/180N.jpg
 
 --
Bill Byrom N5BB
 
 
 
On Sun, Mar 13, 2016, at 01:50 PM, James Flynn wrote:
> <jmfranke@...> writes:
>
>>
>> I noticed that NIST, at http://nist.time.gov/, is still sending 
> standard time. When do they change?
>>
>> John  WA4WDL
>>
>>
>
> As of 1849Z it was reporting DST.
>
>
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Links:

  1. https://en.wikipedia.org/wiki/OpenLaszlo
  2. http://xearth.org/
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