My computer was in suspend mode during the daylight saving time switching. The system time was correct afterwards but the configured events have been moved by one hour. The usual time is 20:00, now it is 21:00. Reproducible: Always
Which version of KDE and KAlarm are you using? (Use menu option Help -> About KAlarm to find out.) Which time zone is configured as the default for KAlarm? Use menu option Settings -> Configure KAlarm, and then select the Time & Date tab to check. Do you use KAlarm's default time zone for your alarms? To verify this, open an alarm and if you're using the default, no time zone will be listed beside the Time Zone button.
(In reply to David Jarvie from comment #1) > Which version of KDE and KAlarm are you using? Version 2.11.4-5ak (I could not select that one in the bug report form). KDE Frameworks 5.20.0 Qt 5.5.1 (kompiliert gegen 5.5.1) Das xcb Fenstersystem > Which time zone is configured as the default for KAlarm? Europe/Berlin > Do you use KAlarm's default time zone for your alarms? To verify this, open > an alarm and if you're using the default, no time zone will be listed beside > the Time Zone button. Nothing is listed there for both existing and new alarms. I have to click on "more options" (in German) in order to see the time zone setting at all. And I don't think I ever clicked that before.
See also bug 360674
An interesting addition: I cannot set the time back within the next hour. Now it is 12:12. If I need an alarm at 13:30 then I can set it to 12:30 in order to activate at the right time. But if I need an alarm at 12:30 I cannot set it to 11:30. The dialog complains that this time had already passed.
*** This bug has been marked as a duplicate of bug 336738 ***