Good list, and interesting how at least half of the points are about localisation/internationalization. The date point was good I find that one very annoying. The easiest way to work it out on forums is usually to look at the previous post and see what number goes down (day).
I didn't realise the mm/dd format was only officially used in two countries. I've never understood why it's use at all, it makes much more sense going from day-month-year. Is there a reason mm/dd was chosen in the US and Belize?
As with most internationalization problems, blame the British. We used this middle-endian format around the time we colonised North America (I guess it does kind of make sense when you're reading aloud). The USA standardised on it, whereas most of the rest of the world (including Britain) moved on to a more logical format.
See also: power plugs. The British came up with a new British Standard plug seemingly every few years, and all the places we colonised use a different British Standard. We are the reason you need to spend $20 on a universal power adapter with 10 different attachments.
Indeed. Even going 50 years back, we had different plugs for different parts of the UK. I remember my grandmother plugging stuff into her light fitting as well with an adapter. I'm sure stuff caught fire a lot then.
Regarding dates, I think yyyy-mm-dd makes sense (big endian dates) as you can sort naturally.
I switched to yyyy-mm-dd for almost all my own records shortly after I learned about it when I started using Linux in 1996. Having any consistent format helps in searching, and as you pointed out this is the simplest to sort.
I don't know which came first, but it agrees with the way we say it out loud. "Today is September tenth." So, maybe that's why?
And I think in other countries, it's said the other way around, right? "Today is the tenth of September?" That would actually be okay sounding in the U.S., too, though a little uncommon. Can you say "Today is tenth September"? That sounds very weird to me.
I agree it's a silly ordering. What dialect of English do you speak?
> September the Tenth
Even this sounds a little funny to my ears. In American English people say almost exclusively "September Tenth" in that order without any prepositions.
I'd be curious to hear you elaborate on this one. In American school, I learned that 'two hundred three' is the only acceptable version, but in casual speech people invariably say 'two hundred and three', which sounds more natural.
> In American English people say almost exclusively "September Tenth" in that order without any prepositions.
Possibly regional, but I hear people say 10th of September quite often on the US West Coast. I would guess it has to do with the way we talk about the date... days in the future seem to follow the mm dd format while talking about the current date seems to follow dd of mm.
> And I think in other countries, it's said the other way around, right? "Today is the tenth of September?" That would actually be okay sounding in the U.S., too, though a little uncommon. Can you say "Today is tenth September"? That sounds very weird to me.
You mean in english? Because in portuguese we use cardinals to refer to days, and not ordinals. "Dez de setembro de 2012"—literally: "Ten of September of 2012." I'd guess it's the same in spanish.
Interestingly someone had the foresight to use dd/mm on the US customs and immigration forms handed out to arriving visitors. I guess then only visitors from Belize are likely to get caught out :-)
Does this practice extend to other official forms?
I think there should be a distinction made in this discussion between the technical use of dates for the purpose of storage, and display of dates for the end user.
Why don't we display dates as seconds since epoch? Because people don't recognize that format.
For technical purposes, use a date format with technical advantages (YYYYMMDD). For displaying the date for the user, format it so people can understand it (ex. January 10th, 2013) - and localize it if you have that information, or allow customization, or it all else fails, provide and explanation.
I didn't realise the mm/dd format was only officially used in two countries. I've never understood why it's use at all, it makes much more sense going from day-month-year. Is there a reason mm/dd was chosen in the US and Belize?