No idea what you based those claims on, but the spec itself (I have the pdf) and Wikipedia’s summary disagree. ISO8601 allows for YYY-MM-DD yes but it allows for a bunch of silly stuff.
The omitting of timezones doesn’t matter to a vast majority of the world, since most countries only have one time zone so I don’t see a reason why that is relevant in most use cases.
ISO is a general standard, it’s in the name and the RFC is created for the internet, that is also in the name/description of the RF.
Using 2025-164 can be handy, I actually use the day of the year to check what invoices from previous year are open since those are the invoices that are due 164 days or more.
No idea what you based those claims on, but the spec itself (I have the pdf) and Wikipedia’s summary disagree. ISO8601 allows for YYY-MM-DD yes but it allows for a bunch of silly stuff.
https://en.m.wikipedia.org/wiki/ISO_8601
Both “2025-W24-4” and “2025‐163” are valid representations of today’s date in ISO8601.
(Also the optional timezone makes it utterly useless.)
The omitting of timezones doesn’t matter to a vast majority of the world, since most countries only have one time zone so I don’t see a reason why that is relevant in most use cases.
ISO is a general standard, it’s in the name and the RFC is created for the internet, that is also in the name/description of the RF.
Using 2025-164 can be handy, I actually use the day of the year to check what invoices from previous year are open since those are the invoices that are due 164 days or more.