Newsgroup: it.cultura.linguistica.inglese
Titolo: Re: 22:30cet VS 22:30cet

 22:30cet     "at twenty-two, thirdy, cet"
Magari l'avranno pronunciato cosi`, ma si scrive "thirTy".
Antonio

 british l'ora a 12H?
In Inghilterra non si usa 24H molto; si vede scritto negli orari degli 
autobus o dei treni, ma nel parlato non si sente molto (ma e` usato dai 
militari). 
Antonio

 O;-) seguendo le vs dritte!
Eh?

 da 24H o quella da 12H? 
Quella piu` inglese e quella da 12H. Per un punto di vista americano, devi 
rivolgerti ad un americano.
Antonio

 non si[cut]
Ma di che diamine stai parlando? Sei vuoi fare il simpatico, almeno 
scrivi le cose correttamente.


Communications logbooks begin at 00:01 with the entry "Begin new radio day".
The last entry of the day is at 23:59, "End radio day". The two minutes
between 23:59 and 00:01 are ignored.
Joe from Massachusetts


It is not only communications logs which use this notation.
�A valid time in 24-hour format. Range: 0001-2359. [Following international
convention midnight is either 2359 of preceding date or 0001 of following
date (that is, 0000 and 2400 will not be accepted).] �
http://www.dhs.vic.gov.au/ahs/archive/vemd99manual/p20.htm
We also try to avoid using "12 a:m" and "12 p:m" and use "12 midnight" and
"12 noon" for clarity. How can midnight be 12 a:m of the day just starting
if 12 hours of the day have not yet passed? Maybe midnight should be 12 p:m
of the day just ending? But then 12 a:m would be noon. It is only by
convention, not logic, that "12 a:m" is defined as midnight, and "12 p:m" is
defined as noon.
If we say "00:00" for midnight, that suggests the beginning of the day. If
we say "24:00" for midnight, that suggests the end of the day. Which is it?
Joe from Massachusetts

 I would write 12 p:m for midnight and 12 a:m for noon.
Then one minute after midnight would be 12:01 p:m?
And one minute after noon would be 12:01 a:m?
You would be wrong, according to convention.
«Terms 12 a.m. and 12 p.m. cause confusion and should not be used as neither
the "12 am" nor the "12 pm" designation is technically correct.
It advisable to use 12 noon and 12 midnight where clarity is required.
To avoid ambiguity, airlines, railroads, and insurance companies use 12:01am
for an event beginning the day, 11:59pm for ending it.»
http://www.worldtimezone.com/wtz-names/wtz-am-pm.html
The ambiguity avoided by using 12:01 a:m and 11:59 p:m in the 12- hour
system would also be avoided by using 00:01 and 23:59 in the 24-hour system.
Joe from Massachusetts

 If the day starts at 00:00, when does it end?
A day is the sum of all the temporal points in [00:00, 24:00). This 
interval has a minimum, 00:00, but no maximum (24:00 doesn't belong to 
the interval).
That's the way a mathematician would see it.
Kiuhnm

 single point named 00:00 and nicknamed 24:00.
I wouldn't use "circular sets". For instance, [00:00, 00:00) would 
indicate an infinite collection of intervals (the null interval, one 
day, two days, etc...).
Kiuhnm


In conversation, midday is rare in the US.
In writing, midday is common, but noon is much more common.
Joe from Massachusetts

 Posso chiederti quanti anni hai?
Certo che puoi :-)
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