Make sure the global timezone on your event is correct.
1.Once you have created an event select it from the "Events" tab on the left hand side of the screen.
2. Once you have selected the Event click on the edit button.
3. After you have pressed the edit button select the "Event Details" tab towards the top of the page.
4. Scroll down until you reach "Event Times" section.
5. Click on the box below "Event Timezone" and scroll through the list of timezones and select the one you want.
"Hint" The timezones are in order from -hours to +hours.
6. Once you have finished editing press the "Save" tab to keep your changes.