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Dan Allen wrote:
"Cell phones are the first  common technology which automatically change
time zones."

And they  usually get these things right. Of course you have to be passed off
to a cell in  the new time zone before it takes effect.

And added:
"I have always  wondered why Garmin and others did not put a
little more effort into  displaying the right local time automatically:
a GPS knows where you are, add  a map of the time zone boundaries and
you can do it automatically, but nobody  does!"

Well, at least part of the problem is that the laws are local and  they
change. When did the standard rule for DST change in the US, by the way? It  was
different 25 years ago, I think. Of course most PC operating systems do it
automatically, but they're perhaps easier to keep  up-to-date.

And:
"However I have noticed that my Motorola cell phone  does not
automatically change times for Daylight Savings Time.  You must  turn
the phone off and then back on again, and when it wakes up it then  gets
the right time post-time zone change."

Interesting. Two weeks ago  Saturday night when we switched over to DST, I
was out with a few friends. One  had a cell phone that jumped ahead at 1am --an
hour early-- then went back to  Standard Time about 15 minutes later (I don't
remember which service provider).  At 4am his phone still displayed Standard
Time. Two of us, on different  services, saw the switchover on our phones
within a minute of the correct time  when 2am became 3am. And a fourth saw no
change until late the following  evening. In your case, I wonder if you would get
the DST update by travelling as  well as by powering down... That is, do you
get time zone changes as you drive  along a highway? Or have you only had the
experience of checking the time zone  after a power-down (presumably when flying
cross-country)? If you do get time  zone updates while moving from cell to
cell without powering down, then it seems  likely you would Savings
Time/Standard Time updates similarly. So now you have a  project for 2am on the first
Sunday in October six months from now!  

-FER
http://www.HistoricalAtlas.com/lunars

   

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