Gransnet forums



(15 Posts)
crun Fri 09-Jan-15 11:54:52

I was wondering whether to put this in pedant's corner, but as it's ramifications are a bit more serious than just idle curiosity.....

The DVLA have just written to me saying that my licence expires at midnight on 24.2.15. That begs the question is midnight the end of a day or the beginning of a day. It seems to me that midnight is at the beginning of the day because the clock should go:


and not:


But somehow I don't think that's what most drivers will choose to assume.

It appears that the NIST haven't really made up their minds either.

And according to Wiki, neither have the ISO: "Midnight is a special case and may be referred to as either "00:00" or "24:00". The notation "00:00" is used at the beginning of a calendar day and is the more frequently used. At the end of a day use "24:00". "2007-04-05T24:00" is the same instant as "2007-04-06T00:00""

It makes me wonder what the ISO is for if it's not to prevent ambiguity and confusion, but then, I also think that it's a shame that the decimal clock didn't survive instead of being lumbered with a messy sexagiesimal system.

hildajenniJ Fri 09-Jan-15 12:54:20

I worked in mental health, with demented elderly in a Residential setting. All our forms and paperwork used the twenty four hour clock. When filling in the night check records, the new day started at 00.00. I've always understood the new day to start at midnight, that being 00.00. In all my working life I have never seen 24.00 written for midnight.

janerowena Fri 09-Jan-15 13:33:02

Me neither.

crun Fri 09-Jan-15 15:12:01

So if your licence expired at midnight on Tuesday, would you drive on Tuesday afternoon or not?

FarNorth Fri 09-Jan-15 15:40:12

I'd be driving on the Tuesday afternoon, anyway.

vampirequeen Fri 09-Jan-15 16:07:30

If it expires at midnight then it's still valid in the afternoon.

crun Fri 09-Jan-15 16:40:32

So far, that's two who think that midnight is 00:00:00, and two who think it's 24:00:00.

loopylou Fri 09-Jan-15 17:28:38

24.00 for me, never seen 00.00 written anywhere! Certainly not when doing night shifts on the ward, was always 24.00 followed by 00.01.
Still valid in the Tuesday afternoon as far as I can see.

rubysong Fri 09-Jan-15 18:04:30

I think midnight is the middle of the night following the day mentioned i.e. 24:00.

Ana Fri 09-Jan-15 18:15:05

I agree that midnight should mean the middle of the night, which would make the start of 'morning' 6 hours later. It's an odd system! confused

Ana Fri 09-Jan-15 18:16:55

Or perhaps it's just that 'midnight' is an odd way of describing 24.00...

hildajenniJ Fri 09-Jan-15 19:03:01

loopylou where I worked it was written thus: 23.59. and then 00.00. we never used 24.00 and I never asked why?

Elegran Fri 09-Jan-15 19:24:35

When you count up to ten you start at 1 and keep going until you reach 9 After that it is "1 in the tens column and start again in the units column". You don't put 10 in the units column, once you go over 9 units, you have one ten.

If you are counting in units of less than one, it is 0.1, 0.2 . . . . 0.9, then 1.0

The minutes and seconds of the hour between midnight and 1 am go from "no hours, no minutes and one second" after the zero of midnight.

There is no 24 - it starts again at zero. Yes, there are 24 hours in a day, but that is the length of time in a day , not the number of hours a specific time is from the day-change point (midnight).

crun Sat 10-Jan-15 00:03:44

My intuition says 24:00, but my logic says 00:00.

Fili Thu 19-Mar-15 11:21:35

Suppose that 00.00. But when it comes to burocracy. You never know)