Version: 4.3.1 (using KDE 4.3.1) OS: Linux Installed from: Fedora RPMs [maarten@antek2 ~]$ date -R Thu, 15 Oct 2009 09:23:24 +0200 When i enter all-day events, say with a start day "15" and end day "16" It is shown in the calendar on 15, 16, 17 that month. This also happens with google calendar entries. Therefore it seems the "end date" entry is also taken as a full day.
Can you try with 4.4.2> ?