Calendar event opens on wrong date

There is a mismatch happening when creating calendar events between 27/10/14 and 31/10/14 inclusive.

Creating an event between these dates adds a notification on the calendar - both in the block and the full monthly view - on the correct date as expected.

However, when you click on the date to view events from the monthly view, or the calendar event it's self, it displays the event as occurring on the previous day.

Note, version of Moodle is actually v2.6.2+ (but drop down below doesn't allow for that)

Thanks,
Mark.