Looks like another example here:
> Subject: The Ghost of Y2K hits Hamburg (Hamburger Abendblatt)
>
> The city of Hamburg in Germany has 120 new DT5 trains - and 95 of
> them still won't work after the new decade has blown in. As soon as a
> train reaches the end of the line and has to reverse its direction (and
> the train driver must turn it off and walk to the other end to drive it
> back), it won't turn on again. At all.
>
> The Hamburger Abendblatt reports in that an informer told them that this is
> attributable to a date problem, with the year flipping from 19 to 20.
>
>
https://www.abendblatt.de/hamburg/article228038743/U-Bahn-Hamburg-DT5-ausgefallen-Hochbahn-Software-Fehler-Verkehr-Verspaetung-Stoerung.html>
> All the trains stopped dead in their tracks, so to say. They have
> managed to fix the software on 25 of them, but so many are missing
> they are having to run short trains in the hopes of even keeping
> up with the schedule.
>
> A bit later in the article an update is mentioned as being at fault, the
> rest of the article is politicians blathering on.
>
> Their troubles don't stop there: a passenger purchased a ticket on 1 Jan
> 2020 that is not valid until 1.1.2040. Picture included.
Sorry, I can't read the original link so can't say if this is an accurate summary, but all sounds plausible.