If you use the Bizzabo online agenda to add items to your Outlook calendar, it converts the timezone to the correct time but one day later than it ought to be.
Example: Keynote on Wed 27 July 09:00 - 09:45am (Denver time) should be a calendar appointment converted to Thu 28 July 00:30 - 01:15am (Adelaide time). However, the appointment is created for Fri 29 July 00:30 - 01:15am.
Note: This is different to a timezone issue previously reported and fixed (InstructureCon app 'add to calendar' inaccurate). That had the right day and wrong time. This is the wrong day and right time.