Mandatory information about my setup:

Have I searched the tickets before posting? Yes
Have I searched the forum before posting? Yes
Have I read the documentation before posting (which pages?)? Yes
Joomla! version: 2.5.24
PHP version: 5.3.27
MySQL version: 5.5.32
Matukio version: 4.4.2
Direct link to the page that shows the issue: (unknown)

Description of my issue:
I've created an event with multiple dates.
After a reservation the begin and end time (from MAT_EVENT_BEGIN and MAT_EVENT_END) is for some dates good and for some dates it shows the begin time minus one hour (Wintertime?).
The even starts at 11.00 hout but in the mail it is show as 10.00 hour.
What can I do to show the right time?