Has Kontact set US time to standard early?

The appointments I’ve sent for this week using the 4.1.0 version of KOrganizer arrive with an invite time that is an hour later than the time sent. Is this a daylight savings time conversion issue, or do I have something fundamentally set wrong?

Also, I imported an older calendar into this newer version, and some of the repeating appointments are now on the wrong day.

Thank you in advance for any assistance.