My events have a different time than in Apple's calendar

Time differences are always caused by calendar using different timezones: this can cause your events to be one or more hours off, for example. The solution is to ensure both apps use the same timezone.

Also see http://support.apple.com/kb/HT4504.

Ensure the iPhone's calendar and Week Calendar are using the same timezone:

If this fails:

Please remove your synced iCal calendars from your iPhone, wait 5 minutes and re-add them again. This usually clears the timezone cache of your iCal calendars.