In case you use the calendar at the bottom of this blog as reference, ensure that you actually click on to the entries in order to view when the event is taking place.
Currently, the calendar overview is displaying all entries one day too early. So e.g. the Swans gig on Monday 13th is showing as Sunday 12th but if you click on the event entry it gives you the correct detail of Monday 13th. It appears to be some Google issue that I have no influence over.