Created attachment 182980 [details] Screenshot of the incorrect calculation SUMMARY When entering an all-day event spanning multiple days, then hovering over the resulting calendar event, the duration calculation is incorrect. STEPS TO REPRODUCE 1. Create a new all-day event, spanning multiple days 2. Save the event 3. Hover over the event OBSERVED RESULT The duration is "%n day and 21 hours" EXPECTED RESULT The duration should be something like "40 days" SOFTWARE/OS VERSIONS Operating System: Kubuntu 25.04 KDE Plasma Version: 6.3.4 KDE Frameworks Version: 6.12.0 Qt Version: 6.8.3 Kernel Version: 6.14.0-22-generic (64-bit) Graphics Platform: Wayland Processors: 24 × AMD Ryzen 9 5900X 12-Core Processor Memory: 31.3 GiB of RAM Graphics Processor: Intel® Graphics ADDITIONAL INFORMATION