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3kramd5

EOS 5D MK IV
Mar 2, 2012
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:unsure: USA standard format is MM/DD/YYYY. Previous companies I’ve worked at have adopted an unambiguous format – 26Aug2019 – for recordkeeping, e.g., lab notebooks. One significant problem with that, as well as with both the US and international formats, is that they don’t sort chronologically (e.g. file names). YYYYMMDD is useful for that reason.
I’ve never seen a standard for the country enumerated (nor have I looked for one). In my professional life I use, among others, ASME and ISO standards. Y14.100 and 8601* both require YYYYMMDD. I also adopted that format many years ago for the reason you cite (sorting).

*ISO allows various other formats, such as YYYYDDD, YYWwwD, but the complete representation is as the aforementioned.
 

neuroanatomist

I post too Much on Here!!
Jul 21, 2010
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I’ve never seen a standard for the country enumerated (nor have I looked for one). In my professional life I use, among others, ASME and ISO standards. Y14.100 and 8601* both require YYYYMMDD. I also adopted that format many years ago for the reason you cite (sorting).

*ISO allows various other formats, such as YYYYDDD, YYWwwD, but the complete representation is as the aforementioned.
The Chicago Manual of Style is as close as you'll probably come to a 'US standard'. Note that I was using 'standard' in the sense of a convention, not as in an ISO standard.

But in the original case, I suspect the Australian poster's error in stating the current date was part of the confusion.
 

privatebydesign

Would you take advice from a cartoons stuffed toy?
Jan 29, 2011
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:unsure: USA standard format is MM/DD/YYYY. Previous companies I’ve worked at have adopted an unambiguous format – 26Aug2019 – for recordkeeping, e.g., lab notebooks. One significant problem with that, as well as with both the US and international formats, is that they don’t sort chronologically (e.g. file names). YYYYMMDD is useful for that reason.
The old I-95 USA immigration form for non USA citizens used to have the 'USA' standard MM/DD/YYYY on the front part which was for immigration, on the back section that was for customs it was DD/MM/YYYY!

I utterly hate the confusion that has arisen around the two digit, two digit, year and I never write it like that. On a form I will always put the month with letters, if it is first or second, so there can never be any confusion over the day/month or month/day.
 

Don Haines

Beware of cats with laser eyes!
Jun 4, 2012
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The old I-95 USA immigration form for non USA citizens used to have the 'USA' standard MM/DD/YYYY on the front part which was for immigration, on the back section that was for customs it was DD/MM/YYYY!

I utterly hate the confusion that has arisen around the two digit, two digit, year and I never write it like that. On a form I will always put the month with letters, if it is first or second, so there can never be any confusion over the day/month or month/day.
Agreed!

2019/08/09..... Is it September 8 or August 9?
09/2018/08... same problem plus does not sort well
08/18/09.... now you are trying to make it confusing!

2019/Sep/08.... unambiguous
 

neuroanatomist

I post too Much on Here!!
Jul 21, 2010
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Agreed!

2019/08/09..... Is it September 8 or August 9?
09/2018/08... same problem plus does not sort well
08/18/09.... now you are trying to make it confusing!

2019/Sep/08.... unambiguous
Today is the two-hundred and thirty-eighth day of the two-thousand and nineteenth year of the current era. Also unambiguous, but not nearly as helpful.
 

privatebydesign

Would you take advice from a cartoons stuffed toy?
Jan 29, 2011
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Agreed!

2019/08/09..... Is it September 8 or August 9?
09/2018/08... same problem plus does not sort well
08/18/09.... now you are trying to make it confusing!

2019/Sep/08.... unambiguous
Also, like Neuro pointed out, any unambiguous way of writing it means it can't be sorted numerically which means I end up putting a letter for a week on the front of a date formatted file into a year folder; and, I hate it when on line forms or spreadsheet and word processing forms 'help' you when you type in something it thinks might be close to a date and it changed the format because that isn't how the preference is set for th date format for that particular document.
 

neuroanatomist

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Jul 21, 2010
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20190908T00Z is unambiguous and lexicographically sortable (as long as the time zone stays Z).
Sorry, no. 2019 09 08 — is that September 8th or 9th August? Formats where both the month and day are represented numerically are only unambiguous if the day is the 13th or higher (or on those days where the month and day are the same number, 01/01, 06/06, etc.), and that assumes the year is represented by all four digits (i.e. 08/09/10 could be 09Aug2010 or 08Sep2010 or 09Oct2008 etc.).
 

privatebydesign

Would you take advice from a cartoons stuffed toy?
Jan 29, 2011
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I do actually use UTC/Z and often find it interesting the reason some call it one and others the other seeing as how they are exactly the same thing.

Dates we can't get right yet are pretty straightforwards, time, which is much more complicated, ends up with several understandable names for the same thing!
 

Kit.

EOS 6D MK II
Apr 25, 2011
1,151
564
Sorry, no. 2019 09 08 — is that September 8th or 9th August?
It is not "2019 09 08".
It is "20190908T00Z".
The very beginning of September 8th in the UTC+0 timezone.
And still September 7th in the timezones with negative UTC offsets.

Formats where both the month and day are represented numerically are only unambiguous if
...they are standardized in a clearly recognizable format. Like ISO 8601 above.
 

neuroanatomist

I post too Much on Here!!
Jul 21, 2010
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It is not "2019 09 08".
It is "20190908T00Z".
The very beginning of September 8th in the UTC+0 timezone.
And still September 7th in the timezones with negative UTC offsets.

...they are standardized in a clearly recognizable format. Like ISO 8601 above.
A very large proportion of the people in the world use calendar dates. A very tiny proportion of the people in the world have even heard of the International Organization for Standardization, much less ISO 8601. Logically, the format is clearly recognizable to only a small proportion of people, and to most people 20190908T00Z would be an ambiguous representation of a date.
 

3kramd5

EOS 5D MK IV
Mar 2, 2012
3,080
399
This is an epic derail :)

Agreed!

2019/08/09..... Is it September 8 or August 9?
09/2018/08... same problem plus does not sort well
08/18/09.... now you are trying to make it confusing!

2019/Sep/08.... unambiguous
Unambiguous but doesn’t sort well outside databases which recognize month abbreviations. In some systems you’d have alphanumeric sorting leading to: August-April-December-February-January-July-June-March-May-November-October-September, and that’s only in English.
 
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Kit.

EOS 6D MK II
Apr 25, 2011
1,151
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A very large proportion of the people in the world use calendar dates. A very tiny proportion of the people in the world have even heard of the International Organization for Standardization, much less ISO 8601. Logically, the format is clearly recognizable to only a small proportion of people, and to most people 20190908T00Z would be an ambiguous representation of a date.
For the vast majority of those who recognize it as a representation of a date, it will be unambiguous, but nothing short of it will.

For the rest... well, other than for the general sentiment that we should educate people to do things right, it is not my problem.
 

Don Haines

Beware of cats with laser eyes!
Jun 4, 2012
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This is an epic derail :)
Yes :)

But is does raise an interesting question.... why are we stuck with 8 character file names and a very limited ability to customize file names?

Some of us are in the environment where there are multiple shooters with multiple cameras and file naming becomes very important. With limited ability to change filenaming structure, duplicate file names become a problem. We have enforced a renaming structure, so if were to grab the 5D3 and iPhone to shoot something today, my shots would be renamed DH19-08-26-5D3_0001 or DH19-08-26-Phone_0001 and so on.

We name the photographer, the year, the month, the day, the camera, and the sequence number.

It would be nice to get a naming structure straight from the camera.....
 

Kit.

EOS 6D MK II
Apr 25, 2011
1,151
564
Unambiguous but doesn’t sort well outside databases which recognize month abbreviations. In some systems you’d have alphanumeric sorting leading to: August-April-December-February-January-July-June-March-May-November-October-September, and that’s only in English.
Then we have French, for which "jui" can be an abbreviation from both June and July.

Then there is one obscure language in which "maj" means March (while for quite a large part of Europe "maj" means May).
 

Kit.

EOS 6D MK II
Apr 25, 2011
1,151
564
But is does raise an interesting question.... why are we stuck with 8 character file names and a very limited ability to customize file names?
I think it's because Microsoft's patents on the FAT long filenames have expired only very recently (several years ago).