Date Converting

I have a String 30-07-2013 I want to converted in to 30 June. I am using

 NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
    [dateFormat setDateFormat:@"dd/MM/YYYY"];
    NSDate *date = [dateFormat dateFromString:@"30-07-1983"];
They Show response -1984-12-24 18:06:32 +0000