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External Data Source

Source

Regular Expression
^(((((0?[1-9])|(1\d)|(2[0-8]))\.((0?[1-9])|(1[0-2])))|((31\.((0[13578])|(1[02])))|((29|30)\.((0?[1,3-9])|(1[0-2])))))\.((20[0-9][0-9]))|(29\.0?2\.20(([02468][048])|([13579][26]))))$