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External Data Source

Source

Regular Expression
(((19|20)([2468][048]|[13579][26]|0[48])|2000)/02/29|((19|20)[0-9]{2}/(0[469]|11)/(0[1-9]|[12][0-9]|30)|(19|20)[0-9]{2}/(0[13578]|1[02])/(0[1-9]|[12][0-9]|3[01])|(19|20)[0-9]{2}/02/(0[1-9]|1[0-9]|2[0-8])))