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Damn, the timeout for redirecting me to GitHub was too short for me to allow JavaScript in uBlock!

Anyway, can someone with more experience tell me when the huge ISO 8601 would be of use over RFC 3339?

I can't imagine any application using 1% of the random formats available.

ISO 8601 supports all sorts of corner cases, apparently. But it costs money to get the full standard, unlike RFCs. Someone bought a copy and was answering questions few years ago:

https://www.reddit.com/r/ISO8601/comments/mikuj1/i_bought_is...

https://news.ycombinator.com/item?id=26672263

I was unaware that it cost money. RFC for me (I say like I'd have a clue how to implement any RFC).

ISO8601 is a standard managed by ISO, you can buy a digital or printed copy of the standard from here: https://www.iso.org/standard/70907.html

RFC 3339 is managed by the IETF, and their documents are accessible free of charge.

> you can buy a digital or printed copy of the standard from [the ISO]

Or from your national member body, which for some standards and countries can be substantially cheaper.

In Britain, standards can sometimes be obtained for free via your library subscription (which would be orders of magnitude cheaper than the standards are directly, due to government subsidies for libraries).

Representing ranges/intervals ("1st-5th of September 2023") and periods of time ("Four days and two hours")

It can represent a month without a day ("April 2024"), and a year without a month ("2024").

In some countries week numbers are used for various purposes ("School starts in week 33 of 2024", "Recycling will be collected in odd-numbered weeks.").

ISO 8601 also has notations for all sort of stuff the RFC doesn’t need, like uncertain and approximate dates (for libraries or museums perhaps), as well as repeating events, durations, intervals, and such (some of that part is a riff on iCal, or so I’ve heard); most of it is in 8601-2 (which is a thing since the 2019 revision) but some parts are in -1.

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