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Perfect date (jlai.lu)
submitted 6 days ago by [email protected] to c/[email protected]
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[-] [email protected] 16 points 6 days ago

After all the self-important blowhards in the committe were satisified that they had put their fingerprint on the ISO8601 document with bullshit like "year-month-week" format support and signed off, they went home.

The rest stayed behind, waited a few minutes to be safe, and then quickly made RFC3339 like a proper standard.

This is what RFC3339 vs ISO8601 feels like.

[-] [email protected] 10 points 6 days ago* (last edited 6 days ago)

Let's not forget that technically you have to pay for ISO8601, despite it being nearly useless as a standard because it allows several incompatible formats to coexist.

Fucking wild.

[-] [email protected] 7 points 6 days ago

While a fucking stupid concept, it's nice that this particular format has a monetary deterrent.

[-] [email protected] 1 points 6 days ago

Only if you want to say you have the certification for it, you can use it if you want, that is fine

[-] [email protected] 2 points 6 days ago

ISO8601 is YYYY-MM-DD nothing to do with weeks and isn;t the only difference of RFC3339 that you can use a space instead of a T in between the date and time? Also RFC3339 is only an internet standard while ISO is a generally international standard?

[-] [email protected] 3 points 5 days ago
[-] [email protected] 1 points 5 days ago

Yeah I know, but it also has a different use case. As far as I know RFC3339 is mostly used for programming while ISO8601 is the standard for international communication and I wish people would use it more. I have processed American invoices in the wrong month because of their date structure. I have no reason to it, but I always write my date ISO 8601 (YYYY-MM-DD)

[-] [email protected] 3 points 5 days ago

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.)

[-] [email protected] 1 points 5 days ago

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.

this post was submitted on 11 Jun 2025
563 points (87.2% liked)

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