It's the strangest thing I've ever seen. The calendar dates on my Events+ calendar are off by 1 day. For example, Friday Jan 4 (last Fri) is displaying as Fri Jan 5. Jan 5 is a Saturday!
Just to confirm it wasn't my server, or WordPress in general, I added a post to the system and the correct date appears. Help!
OK never mind. Someone changed the WP General setting to start the week on Monday, not Sunday, so the calendar was displaying the correct date/day of week, just everything was shifted to the left in the calendar.