Date and Time Format
International standard for representation of dates and times.
ISO 8601 defines codes and formats for consistent data exchange. It is applied in systems and documents rather than audited, so there is no certification against ISO 8601.
ISO 8601 is the international standard for the representation of dates and times.
There is no certification to pursue, but an experienced consultant can help you apply ISO 8601 alongside the management system standards you are certified to. Reading the published document is the best starting point.
This page summarises ISO 8601 (current published edition). Always confirm the detail against the published document.