This is missing the biggest difference: ISO 8601 costs 190-450€, whereas RFC 3339 is free.
this post was submitted on 27 Oct 2025
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- We need a new standard that unifies all 14 standards.
- Proceeds to create a new standard
- There are 15 standards.
The only way to fully unify all 14 standards is to support all 14 standards.
TIL that, at least according to the linked page, YYYY-MM-DD hh:mm:ss (or %Y-%M-%D %h:%m:%s in strftime format) isn't valid in either system.
ISO8601 apparently disallows spaces altogether, so that space should be a T for it to qualify there; RFC3399 allows the space, but insists there should be a UTC offset of some kind at the end.
Unrelatedly, the page's use of %Z and %z doesn't match with strftime formatting at all, so there's at least one other standards problem lurking here.
This has the “just one more bro” feel to it.