Currently Being ModeratedJun 13, 2012 9:48 AM (in response to Gondeke)
It's caused by a bug because of daylight saving time adjustment on 31st March in to 1st April.
As a fix, delete any all day events you have for 1st April 2013. You can add then to a time i.e. mid-day to replace them.
Once there are no all day events on 01/04/2013 March will open in all views.
Let me know how you get on.
Currently Being ModeratedJun 14, 2012 11:24 AM (in response to Big Al zz)
Brilliant, Big Al zz. This sorted my problem. Thanks very much. I wonder whether Apple will issue a fix or tell people about this - if they don't they'll get inundated with complaints!