|  |  | 
        
          |  |  | 
        
          | D | 
            
              | Day |  
              | The twenty-four hour period during which the earth completes one rotation on its axis. |  | 
        
          | M | 
            
              | Month |  
              | One of twelve divisions of the year as determined by the Gregorian calendar. |  | 
        
          | WD | 
            
              | Working days |  
              | Days when the partner company normally works. |  
              | GS1 Description: Days when a company normally works (excluding national holidays).
 |  | 
        
          | Y | 
            
              | Year |  
              | The period of time as measured by the Gregorian calendar in which the earth completes a single revolution around the sun. |  |