Created attachment 165491 [details] Example event from Merkuro SUMMARY When a recurrence rule for an event is defined, such that the event should recur on multiple weekdays, the recurrence is incorrectly calculated. The event is calculated to occur only once a week instead of several times a week. The issue occurs with both Merkuro and KOrganizer, and is therefore likely an issue with akonadi. STEPS TO REPRODUCE 1. Create an event that recurs on multiple weekdays, e.g. Tue, Wed and Thu (cf. screenshot), whose first occurrence happens on Wed, that happens for 7 times. OBSERVED RESULT The event occurs for 7 weeks, every Wed. EXPECTED RESULT The event should occur for 3 weeks: week 1: Wed, Thu, week 2: Tue, Wed, Thu, week 3: Tue, Wed SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Plasma Version: 5.27.10 KDE Frameworks Version: 5.114.0 Qt Version: 5.15.0 ADDITIONAL INFORMATION On Android (synchronized with CalDAV) the same event is calculated correctly.