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                    | Title | Test
                        Details
                        
                        
                            Pattern Title | 
                
                    | Expression | 
                            ^[0-9]{4}-(((0[13578]|(10|12))-(0[1-9]|[1-2][0-9]|3[0-1]))|(02-(0[1-9]|[1-2][0-9]))|((0[469]|11)-(0[1-9]|[1-2][0-9]|30)))$
                         | 
                
                    | Description | Matches the date format "YYYY-mm-dd" and also validates month and number of days in a month. All leap year dates "YYYY-02-29" passes trough. Could easily be changed to another format. | 
                
                    | Matches | 2004-04-30 | 2004-02-29 | 
                
                    | Non-Matches | 2004-04-31 | 2004-02-30 | 
                
                    | Author | Rating:  Johan Södercrantz | 
            
        
    
        
        
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