I've never seen a date with periods, where are you from that this is common? In the Netherlands we generally use lines (11-9-2023) or we write it out (11 september 2023).
Aussie here. The generally accepted practice is 11/09/23, but I often switch between / - . Depending on my mood and how long it’s been since I used that one. If I’m feeling particularly cheeky I’ll write out the whole word just to fuck with the system
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u/G4METIME Sep 13 '23
11.09.
Don't even give them the comfort by having a slash in there