I have also problems, but this is how i solve the problem.
When you create or adjust a event, you have to click into the calendar. Because then the name is correct. Example:
A: When i open a event or a new one, The date is displayed:
12 Augustus 2013
B: Now i click on the calendar, and choose one / or the same dat. Is will be now:
12 August 2013
A: ERROR
B: No Problem.
I hope it will help someone.
Maybe the owner of the plugin can change it.
