Simplify the following text for a Grade 12 native English-speaking person.
Original: The Jyllands-Posten Muhammad cartoons controversy began after 12 editorial cartoons , most of which depicted the Islamic prophet Muhammad , were published in the Danish newspaper Jyllands-Posten on 30 September 2005 .
Simplified: The crisis began after cartoons depicting the Islamic prophet Muhammad were published in the Danish newspaper Jyllands-Posten on September 30 , 2005 .