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External Data Source

Source

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