[time-nuts] Loran-C & French Clocks

Arnold Tibus Arnold.Tibus at gmx.de
Wed Mar 18 12:53:48 UTC 2009

Sorry Magnus, 
my comment were not related exactly to your question, I know.
Mainly I did want to help to clarify a bit wether France does or

not base their official time to UTC. [L'HEURE LEGALE ou l'heure 
en usage en France se détermine à partir du Temps universel 
coordonné (UTC). "par le décret du 9 août 1978 qui stipule que 
"le temps légal est obtenu en ajoutant ou en retranchant un
entier d'heures au temps universel coordonné" " etc. ]

To remove another questionmark partly:

>I suspect several countries (such as US, Germany etc. etc) to be UTC 
>based, but I do not know for sure.
The german time is fixed by law to MEZ=CET, the Central European

Time, which again is fixed by the same law to the Universal 
Time Coordinated (UTC) as MEZ = UTC+1h.   

For USA and other countries I don't know, but they have lot
of persons who should be informed about...

According to the pic showing the time zones (annex: 
Les fuseaux horaires et les décalages par pays au 1 juin 2000
Crédit: H.M.N.A.O.) most countries are affixed to UTC. 

That' it,
friendly greetings


On Wed, 18 Mar 2009 00:36:03 +0100, Magnus Danielson wrote:

>Arnold Tibus skrev:
>> Magnus and all,
>> interestlingly the discussion about GMT seem to be a never ending 
>> story, all over the world. As I know GMT was already renamed  in 
>> the year 1925 ( or 1928 acc. other source ) to UT and 
>> "universal time coordinated" (U T C) (that) is standard since 
>> January 1, 1972. acc. "About the Time" :
>> http://www.fai.org/astronautics/time.asp ,
>> look into the short overview to this history. 
>> "Does anyone know the exact difference between GMT and UTC?" 
>> - this question seem to be already very old, Magnus. 
>Um. That's not the question I am asking.
>> Richard B. Langley wrote a summary trying to give the right 
>> answer with "A Few Facts Concerning GMT, UT, and the RGO ". 
>> His article can be found here:
>> http://www.apparent-wind.com/gmt-explained.html 
>> It summarizes:
>> "The Greenwich mean time, GMT, has today only an historical 
>> interest. It has been abandoned since the thirties for successively
>>  the T U 1, the T U 2 and finally, in 1972, for the much more regular 
>> universal time coordinated, U T C, that must be used 
>> for all present use." ! 
>> That is what I thought as well quite a while. 
>> But I had to change ever so often all kind of scientific and 
>> technical units, and I see the need to adopt it, I am sure we have 
>> to be open for more steps into the future. Learning will never end...!
>You brings me no new knowledge, only a few more links, which I suspect 
>repeats what my sources already says to me.
>I already know what GMT is in the several senses it is. For me it is 
>clearly not UTC, except for the GMT transmissions done by BBC.
>I object to the use of GMT when it should say UTC, they should not be 
>used interchangeably when talking about international time.
>The question I am asking is really about which is the time-scale 
>accepted for national time in various countries.
>So far:
>UTC based: France, Sweden
>GMT based (UT1?): Great Brittian, Denmark
>I suspect several countries (such as US, Germany etc. etc) to be UTC 
>based, but I do not know for sure.
>As you see, this is a quite different question then asking about "what 
>is GMT" or "what timezone is country X".
>time-nuts mailing list -- time-nuts at febo.com
>To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>and follow the instructions there.

More information about the time-nuts mailing list