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Author Topic: Writing and speaking UTC  (Read 919 times)
WE7MBU
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Posts: 53




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« on: March 31, 2007, 08:24:24 PM »

How does one write out UTC?

Right now it's 03:23:08

Which is right?

0323 ?
323 ?
032308 ?

I'm looking for best practices not so much hard and fast rules.
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N0IU
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Posts: 1245


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« Reply #1 on: April 01, 2007, 04:57:29 AM »

0323

Always 4 digits, but don't sweat the seconds.

Also, for the date, I use the Roman numeral for the month, especially when sending a card to a non-English speaking country. Since today is April 1, 2007, I would write 1-IV-2007 on the card.

Scott N0IU

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K7KBN
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Posts: 2756




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« Reply #2 on: April 01, 2007, 08:00:45 AM »

To add a bit to Scott's post...

When you start receiving cards, especially from European stations, you'll notice that their convention has the date in DAY/MONTH/YEAR format instead of the one we're more familiar with here in the States: MONTH/DAY/YEAR.

To write it out, we here would generally write it in words as "April 1, 2007".  European version: "1 April 2007".

In the other format, we'd write: "4-1-07".  Europeans would write "1-4-07".

For the Roman numeral version, substitute "IV" for the numeral "4" in the above examples.
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73
Pat K7KBN
CWO4 USNR Ret.
KB1LKR
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Posts: 1899




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« Reply #3 on: April 01, 2007, 10:53:22 AM »

or, if space permits, 01Apr07 or even 1 April 2007, etc., but this assumes an English reading recepient.  Japan uses (IIRC) year/month/day format.

It I was recording UTC (or time intervals) to the second (not likely applicable to ham radio communications but various scientific and other  observations come to mind) I'd use "03:23:08 UTC" or for fractional seconds 03:23:08.73 (etc.) to the required number of decimal places.

For hours & minutes, 0323 UTC should be fine, the first two being more casual/infor. I wouldn't drop leading zeros ever though, e.g. time might be at 2356 UTC for a QSO, followed by one at 0003 UTC (or even 0000 UTC).  
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KB9CRY
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Posts: 4284


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« Reply #4 on: April 02, 2007, 05:45:58 AM »

My logbook column for the time is labelled UTC.

If I was going to send you the time for a QSO I'd write it as:

0323Z
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WE7MBU
Member

Posts: 53




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« Reply #5 on: April 02, 2007, 12:40:47 PM »

"
0323Z
"

Zulu time right?  What does "zulu" time mean as opposed to UTC, GMT, or Coridanated Universal Time.  They're all the same.

Rob
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N0IU
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« Reply #6 on: April 02, 2007, 11:09:30 PM »

http://en.wikipedia.org/wiki/Coordinated_Universal_Time
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KB9CRY
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« Reply #7 on: April 03, 2007, 06:56:21 AM »

Real Hams say Zulu time.  You can say all the others since they mean the same thing but real hams say Zulu.

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WB9URN
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Posts: 96




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« Reply #8 on: April 05, 2007, 10:52:35 PM »

ZULU is a military artifact, meaning UTC.
'real hams' say whatever they want.
UTC would be the most acceptable form.
right now, it is 0551 UTC.
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KX8N
Member

Posts: 543




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« Reply #9 on: April 06, 2007, 06:49:36 PM »

As far as the date, on my QSL cards I would have a main box for the date, and then I'd have that main box divided into Date, Month, and Year, with each of them being clearly marked.  That way, you know for a fact that the number in the "date" box is the day of the month, etc - there's no possible margin for error or confusion.  Then, it doesn't matter what the standards are for the country receiving it.
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N6AJR
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Posts: 9887




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« Reply #10 on: May 13, 2007, 10:39:35 PM »

my cards have  a day mo=nth year box labeled and no confusion.

utc is like for cordinated universal time, ( in french or something), zulu is old military time as is gmt , greenwitch mean time,  so there you go
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