[ntp:questions] Can or should the NTP protocol eventually serve timezone data?

Richard B. Gilbert rgilbert88 at comcast.net
Wed Jun 17 23:30:13 UTC 2009


Rob wrote:
> Richard B. Gilbert <rgilbert88 at comcast.net> wrote:
>> Rob wrote:
>>> Richard B. Gilbert <rgilbert88 at comcast.net> wrote:
>>>> Rob wrote:
>>>>> Richard B. Gilbert <rgilbert88 at comcast.net> wrote:
>>>>>> I believe that the O/S vendors supply a file with timezone data.  If you 
>>>>>> have support, you can even get updates from the vendor.  Since I can't 
>>>>>> afford support (I'm retired and a hobbyist) I have to do it by hand.
>>>>> As Jan Ceuleers also pointed out, the problem is not at all limited
>>>>> to operating systems.  Any device that obtains time using NTP and wants
>>>>> to display it in local time needs the info.
>>>>> This could just as well be a digital clock.
>>>> I have a couple of "radio controlled" digital clocks and a wrist watch 
>>>> that do it automagically.  The VLF broadcast from WWVB provides the 
>>>> necessary info.
>>> That cannot be true.  It may work for your location, but I'm sure it
>>> does not cover the general case under discussion.
>> How can it not be true?  The time broadcast encodes both the time 
>> (standard time) and whether or not DST is in effect.  Of course it 
>> doesn't work for those jurisdictions that have chosen to go there own 
>> way as far as DST is concerned.
> 
> There you go.  It works for you, but it does not work in the general case.

I think it works for most people and places.  Most of the US switches 
to/from DST on the same day.  I don't know about the rest of the western 
  hemisphere but since I seldom leave the continental U.S. it doesn't 
really affect me very much.




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