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External Data Source

Source

Regular Expression
^(((\d{4})(0[13578]|10|12)(0[1-9]|[12][0-9]|3[01]))|((\d{4})(0[469]|11)([0][1-9]|[12][0-9]|30))|((\d{4})(02)(0[1-9]|1[0-9]|2[0-8]))|(([02468][048]00)(02)(29))|(([13579][26]00) (02)(29))|(([0-9][0-9][0][48])(02)(29))|(([0-9][0-9][2468][048])(02)(29))|(([0-9][0-9][13579][26])(02)(29))|(00000000)|(88888888)|(99999999))?$