Calendar* Correction: First Black Sabbath Concert with RonnieJames Dio

Some websites report that lead singer Ronnie James Dio performed with Black Sabbath for the first time on April 29, 1980.  There are two problems with this.  First, the scheduled April 29 show at the Guildhall in Portsmouth, England was canceled, as you can tell from the picture above.  Second, Dio made his debut with the group  at the Stadhalle in Aurich, Germany on April 17.  This information is courtesy of the official Black Sabbath website.