From: Marc Espie <marc.espie.openbsd@gmail.com>
Subject: Re: ts(1) & ISO8601 by default (Was: httpd: add timestamps to fastcgi error log)
To: tech@openbsd.org
Date: Mon, 2 Nov 2026 16:58:25 +0100

On Mon, Nov 02, 2026 at 04:56:48PM +0100, Marc Espie wrote:
> I remember back when I was doing timestamp printing for the signature
> of quirks, I stumbled upon this piece of junk.
> 
> https://www.rfc-editor.org/info/rfc9557/
> 
> Just saying, I think that Z makes more sense anyway.
> 
> But it makes sense to recognize both TZ agnostic formats in parsers.

tl;dr: that RFC mandates +0:00 instead of Z.

I don't think it makes a lot of sense to emit the new format, but recognizing
it can occasionally be useful