Because "05/06/2026" could mean either 5 June or 6 May depending on which country wrote it, using ISO 8601 dates in contracts and digital forms prevents exactly the kind of confusion that can invalidate a document or misdate a shipment. It's also the default format most databases and APIs expect.
Source: International Organization for Standardization
Frequently Asked Questions
Why does the year come first in ISO 8601 dates?
The format sorts correctly and unambiguously — largest unit (year) to smallest (day) — so dates also sort correctly as plain text in a spreadsheet or database.
Is South Africa legally required to use ISO 8601 in official documents?
Not universally by law, but many government digital systems and international trade documents default to it for consistency.
Does ISO 8601 also standardise time, not just dates?
Yes — it also defines a 24-hour time format and time zone notation, commonly seen as "T" separators in software timestamps.
