[regularfry]

What it gets you is not having to deal with breakage when someone doesn't know the difference between ISO8601 and RFC3339 or, in fact, `date` strings. Shuffle all that mess off down the stack to where someone else has made one decision, once, rather than having to relitigate it every time.

[8organicbits]

> It is a conformant subset of the ISO 8601 extended format.

Huh, TIL.

https://www.rfc-editor.org/rfc/rfc3339