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External Data Source

Source

Regular Expression
^(19|20)[0-9]{2}-((01|03|05|07|08|10|12)-(0[1-9]|[12][0-9]|3[01]))|(02-(0[1-9]|[12][0-9]))|((04|06|09|11)-(0[1-9]|[12][0-9]|30))$