IsoDate2Num Returns the number of days since the epoch began, given a valid date string. Syntax IsoDate2Num(d) Parameters Parameter Description d A valid date string. Examples The following expressions are examples of using the IsoDate2Num function: Expression Returns IsoDate2Num(“1900″) 1 IsoDate2Num(“1900-01″) 1 IsoDate2Num(“1900-01-01″) 1 IsoDate2Num(“19960315T20:20:20″) 35138 IsoDate2Num(“2000-03-01″) – IsoDate2Num(“20000201″) 29