7 Mar
                
                    2016
                
            
            
                7 Mar
                
                '16
                
            
            
            
        
    
                9:20 a.m.
            
        You never know what uses people will find for putting markers behind the stroke so I would just go ahead and put icons for all six combinations (two rows of three), making the marker in the icon a bit larger so it sticks out.
True. I recommend putting the three suggested by Martin on top, though.
-C