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

David J Taylor david-taylor at blueyonder.not-this-part.nor-this.co.uk.invalid
Thu Jun 18 05:33:55 UTC 2009

Richard B. Gilbert 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.

Only for one country out of hundreds.


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