Calixte Denizet d5661f801f Fix parsing of ambiguous date formats like Hm
We support having hours/minutes numbers with one or two digits for strings like "1:30:31" but
if the format is for example Hm, then "12" is really ambiguous.
So the idea is to match the longest string as possible.
2026-07-20 15:23:23 +02:00
..
2026-04-25 12:13:12 +02:00
2026-06-30 10:45:15 +02:00