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Post times. AM and PM

ceptimus

puzzler
Joined
May 20, 2003
Messages
6,464
I note this forum uses the AM/PM method of displaying post times, rather than the much more sensible 24 hour clock.

What happens at midnight and noon?

Is midnight 12:00 AM or 12:00 PM ?

Why?
 
It's 12:00 PM or 00:00 AM. I think they are both correct, but 12:00 AM is noon.
 
ceptimus said:

Because Americans don't know how to count to 24? That, if they have to tell the time the normal way, they have to take off shoes and socks to count to 20, then count the eyes and ears to make it to 24?

A 24 hour clock, please, Jeff! (The simian offspring, that is...)

Will I get a 24 hour clock, if I buy you a beer at TAM3? :)
 
So you think 12:01 PM is one minute after 12:00 AM ?

That seems wrong to me. The system is ludicrous anyway, but I think 12:00 AM shoild be immediately before 12:01 AM (i.e. 12:00 AM should be midnight), and that leaves 12:00 PM for noon.


I don't think 00 as an hour is valid in the 12-hour clock system.

edited to fix typos
 
El Greco said:
It's 12:00 PM or 00:00 AM. I think they are both correct, but 12:00 AM is noon.
Nope. It's 12:00 midnight and 12:00 noon. If you do see AM/PM designations with 12:00, 12:00 AM is midnight and 12:00 PM is noon. You will never see 00:00 AM in use.
 
Indeed. But this forum does currently use 12:00 AM and 12:00 PM as post timestamps. I guess I shall have to hunt back through some threads to confirm my suspicions.

The reason I became interested, is that I am currently writing some sock puppet detection programs that work on recorded post times. By looking at the intervals between posts, and the posting patterns of members, I suspect that most of my sock puppet suspicions will be quickly confirmed or disproved. :D
 
A problem, even with the 24-hour clock system, is which date is recorded when a post is made at midnight. I suppose the forum bumps the date when the time rolls over from 11:59 PM to 12:00 AM - that makes the most sense to me.

Star dates anyone?
 
I think if you are going to use a 12 hour system instead of a 24 hour system, then 12:00am and 12:00pm should be distinguished by sorting.. that being 12:00am comming before 12:00pm so 12:00am is midnight.
 
On a 24-hr digital clock the range should be 00:00 - 23:59.

It is a matter of custom whether one puts 00:00 for midnight or 24:00, but since there cannot be a 24:01 or 24:02 I prefer 00:00.

To lessen confusion further make it a 24-hr clock on Greenwich Mean Time, so no matter which time zone a post originates from it is time stamped uniformly.
 
BIG vote for 24-hour times. And I'm pretty certain the military forum members will go for it too. Including Hal, of course!

Also, some way of knowing the time of day for each post's poster. This is because my view of the forum is "adjusted" to my local time (GMT+10:00), which means I think some USians have posted in the middle of the night, when it is actually daylight for them. But this gets complicated too... Hmmmm. Much more discussion needed.
 
ceptimus said:
Ah... here's an example. Someone happened to post to a thread at midnight.
12:00 AM is midnight, which means a whole new day, which means the day will roll over...

Next thing you know, you'll want us Americans converting to metric...
 
Yahweh said:
Next thing you know, you'll want us Americans converting to metric...

Now that you mention it..... ;)

I vote that people on JREF have to use the metric system... :D
 
CFLarsen said:
I vote that people on JREF have to use the metric system...

It will be easier for Americans to change their currency to Euro than adopt the metric system. It just won't happen. The country would collapse if it did.
 
speaking of metric, amusing antecdote. i was talking to my father, who is an electrical engineer for GE aircraft engines and is absolutely at the top of his field, and i described something as being about a mm wide. he had absolutely no idea how large that was. i had to describe it as a about a 24th of an inch for him to get it. bizarre that an engineer has no grasp of SI. i generally use metric in my head, though i still find miles to be easier than kilometers.:con2:
 
El Greco said:
It will be easier for Americans to change their currency to Euro than adopt the metric system. It just won't happen. The country would collapse if it did.

EUR/USD: 1,244 :D
 

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