Calendar - Time.setDefaultDisplayTimezone('+00:00'); issue

SmartClient Version: v10.0p_2014-11-16/Pro Deployment (built 2014-11-16)

CHROME - Version 39.0.2171.95 (64-bit)

Link to our Calendar problem:
http://com.moogle.at/calendar_timezone_bug/

When i set Time.setDefaultDisplayTimezone('+00:00');

The created Calendar events are displayed wrong with this DefaultDisplayTimezone.

Our standard Timezone in our Country is +01:00
Anyway we want to calculate with +00:00
But then the Output of the Calendar is Displayed wrong for 1 hour.

Shouldn't the Calendar automatically display the Output correctly in relation to the DefaultDisplayTimezone?

So if you try to create an Calendar event in the Calendar provided by our Link you'll see that the created time isn't the same as the displayed time in the Calendar.

We wonder how this can be fixed

Hope you can help us!
Looking forward to your response
Thaddäus