Data Synchronisation StudioUser GuideCalculated ColumnsFunctionsISO8601DATEOn this pageISO8601DATE Returns the ISO8601 date string for a date. Note that the ISO 8601 date format is YYYY-MM-DD. Syntax string ISO8601DATE(DateTime? value) Example ISO8601DATE(DATEVALUE("12/02/2017")) Will return '2017-02-12'.