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External Data Source

Source

Regular Expression
((^((1[8-9]\d{2})|([2-9]\d{3}))(10|12|0?[13578])(3[01]|[12][0-9]|0?[1-9])$)|(^((1[8-9]\d{2})|([2-9]\d{3}))(11|0?[469])(30|[12][0-9]|0?[1-9])$)|(^((1[8-9]\d{2})|([2-9]\d{3}))(0?2)(2[0-8]|1[0-9]|0?[1-9])$)|(^([2468][048]00)(0?2)(29)$)|(^([3579][26]00)(0?2)(29)$)|(^([1][89][0][48])(0?2)(29)$)|(^([2-9][0-9][0][48])(0?2)(29)$)|(^([1][89][2468][048])(0?2)(29)$)|(^([2-9][0-9][2468][048])(0?2)(29)$)|(^([1][89][13579][26])(0?2)(29)$)|(^([2-9][0-9][13579][26])(0?2)(29)$))