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External Data Source

Source

Regular Expression
^((((([1-9])|(0[1-9])|(1\d)|(2[0-8]))/(([1-9])|(0[1-9])|(1[0-2])))|((31/(((0[13578])|([13578]))|(1[02])))|((29|30)/(((0[1,3-9])|([1,3-9]))|(1[0-2])))))/((20[0-9][0-9]))|(((([1-9])|(0[1-9])|(1\d)|(2[0-8]))/(([1-9])|(0[1-9])|(1[0-2])))|((31/(((0[13578])|([13578]))|(1[02])))|((29|30)/(((0[1,3-9])|([1,3-9]))|(1[0-2])))))/((19[0-9][0-9]))|(29/(02|2)/20(([02468][048])|([13579][26])))|(29/(02|2)/19(([02468][048])|([13579][26]))))$