Control: tags -1 + upstream Hi Jakub,
On Fri, Jul 17, 2026 at 06:29:54PM +0000, Jakub Wilk wrote: > Timestamps printed with --time-format=iso are not valid ISO 8601: > > # wtmpdb last --time-format=iso | grep -wm1 boot > s-reboot system boot 6.1.0-50-amd64 2026-07-17T18:15:14+0000 - still > running > > This is invalid, because there's no colon in the timezone offset. > > In contrast, util-linux's last(1) did it right: > > # last --time-format=iso | grep -wm1 boot > reboot system boot 6.1.0-50-amd64 2026-07-17T20:05:09+02:00 still > running I'm not au fait with ISO 8601, which appears not to be a free standard, but from a brief web search it seems the +HHMM form might be a valid variant and indeed, that which is produced by strftime(3) %z according to its man page. Would you mind raising an issue upstream where you can argue the point directly with the upstream maintainer? Regardless of its correctness, while I agree for continuity it would be nice if this matched util-linux, we missed the boat for this in trixie and neither the version of last in src:sysvinit or src:acct supports the iso option so I think the case to patch in Debian would be weak. Do you know of any downstream tooling depending on this behaviour? Thanks Andrew
