There are a couple I have in mind. Like many techies, I am a huge fan of RSS for content distribution and XMPP for federated communication.
The really niche one I like is S-expressions as a data format and configuration in place of json, yaml, toml, etc.
I am a big fan of Plaintext formats, although I wish markdown had a few more features like tables.
ISO 8601 date format. Not because it’s from a standards body, but because it’s simple, sensible, clearly defined, easy to recognize, and very effective.
Date field placement in any order other than most-significant-digits-first is not only counterintuitive, but needlessly complicated to work with. Omitting critical information like the century is ambiguous and confusing.
We don’t live in isolated villages any more. Mixing and matching those problems by accepting all the world’s various regional and personal date styles, especially with no reliable indication of which ones apply in any given case, leads to the hodgepodge of error-prone date madness that we have today.
The 2024-09-02 format should be taught in schools and required in official documents. Let the antiquated date styles fall into disuse outside of art and personal correspondence, like cursive writing.
The year is the information that most of the time is the least significant in a date, in day to day use.
DDMMYY is perfect for daily usage.
DDMMYY is perfect for daily usage.
Except that DDMMYY has the huge ambiguity issue of people potentially interpreting it as MMDDYY. And it’s not straight sortable.
My team switched to using YYYY-MM-DD in all our inner communication and documents. The “daily date use” is not the issue you think it is.
Except that DDMMYY has the huge ambiguity issue of people potentially interpreting it as MMDDYY.
Yes and YYYY-MM-DD can potentially be interpreted as YYYY-DD-MM. So that is an zero argument.
I never said that the date format should never used, just that significants is a arbitrary value, what significant means depends on the context. If YYYY-MM-DD would be so great in everyday use then more or even most people would use it, because people, in general, tend to do things that make their life easier.
There is no superior date format, there are just date format that are better for specific use cases.
My team switched to using YYYY-MM-DD in all our inner communication and documents
That is great for your team, but I don’t think that your team has a size large enough to have any kind of statistically relevance at all. So it is a great example for a specific use case but not an argument for general use at all.
Your day to day use isn’t everyone else’s. We use times for a lot more than “I wonder what day it is today.” When it comes to recording events, or planning future events, pretty much everyone needs to include the year. Getting things wrong by a single digit is presented exactly in order of significance in YYYY-MM-DD.
And no matter what, the first digit of a two-digit day or two-digit month is still more significant in a mathematical sense, even if you think that you’re more likely to need the day or the month. The 15th of May is only one digit off of the 5th of May, but that first digit in a DD/MM format is more significant in a mathematical sense and less likely to change on a day to day basis.
For any scheduled date it is irrelevant if you miss it for a day, a month or a year. So from that perspective every part of it is exactly the same, if the date is wrong then it is wrong. You say that it is sorted in the order of most significants, so for a date it is more significant if it happend 1024, 2024 or 9024? That may be relevant for historical or scientific purposes but not much people need that kind of precision. Most people use calendars for stuff days or month ahead or below, not years or decades.
If I get my tax bill, I don’t care for the year in the date because I know that the government wants the money this year not next or on ten. If I have a job interview, I don’t care for the year, the day and months is what is relevant. It has a reason why the year is often removed completely when dates are noted or made. Because it Is obvious.
Yes I can see why YYYY-MM-DD is nice for stuff like archiving purposes, it makes sorting and grouping very easy but there they already use the best system for the job.
For digital documents I would say that date and time information should be stored in a defined computer readable standard so that the document viewer can render or use it in any way needed. That could be swatch internet time as far as I care because hopefully I would never look at the raw data at all.
For the newbies: RFC 3339 vs ISO 8601. Bookmark this site.
That looks like an interesting diagram, but the text in it renders too small to read easily on the screen I’m using, and trying to open it leads to a javascript complaint and a redirect that activates before I can click to allow javascript. If it’s yours, you might want to look in to that.
The table below works, though. Thanks for the link.
I had the fortune of being hired to build up from zero my department, and one of the first “rules” I made was all dates are ISO-8601 and now every process runs with 8601, if you use anything different your code is going to fail eventually when it finds another column date in 8601.
I love this standard. If you dig deeper into it, the standard also covers a way to express intervals and periods. E.g. “P1Y2M10DT2H30M” represents one year, 2 months, 10 days, 2 hours and 30 mins.
I recall once using the standard when writing a cron-style scheduler.
I also like the POSIX “seconds since 1970” standard, but I feel that should only be used in RAM when performing operations (time differences in timers etc.). It irks me when it’s used for serialising to text/JSON/XML/CSV.
Also: Does Excel recognise a full ISO8601 timestamp yet?
I also like the POSIX “seconds since 1970” standard, but I feel that should only be used in RAM when performing operations (time differences in timers etc.). It irks me when it’s used for serialising to text/JSON/XML/CSV.
I’ve seen bugs where programmers tried to represent date in epoch time in seconds or milliseconds in json. So something like “pay date” would be presented by a timestamp, and would get off-by-one errors because whatever time library the programmer was using would do time zone conversions on a timestamp then truncate the date portion.
If the programmer used ISO 8601 style formatting, I don’t think they would have included the timepart and the bug could have been avoided.
Use dates when you need dates and timestamps when you need timestamps!
RFC 3339 is a simplified profile of 8601 that only covers YYYY-MM-DD style formatting, if you only ever use that format and avoid the things like “2024-W36” they’re mostly interchangeable.
