Hi It seems that Week numbers are wrong.
'(org-display-custom-times t) '(org-timestamp-custom-formats '("%Y-%m-%d (W%W)\12" . "%Y-%m-%d (W%W) %H:%M")) in the customization menu: Org Timestamp Custom Formats: Cons-cell: String: %Y-%m-%d (W%W) String: %Y-%m-%d (W%W) %H:%M If you send "C-c ." And write down: W17, you get: - [2025-04-23 mi. (W16) 17:05] Which should be Week 17, instead of W16 Other settings: '(calendar-week-start-day 1) Regards