ISO 8601 (YYYY-MM-DD) is the international standard for date formatting, endorsed by ISO and adopted by most databases, APIs, and programming languages. It eliminates the MM/DD vs DD/MM ambiguity and sorts correctly as a string.
Date to ISO 8601 Converter
Get the unambiguous ISO date for any input
How to date to ISO 8601
- 1.Enter a date in any format — US, EU, long form, or timestamp.
- 2.The ISO 8601 format (YYYY-MM-DD) appears in the results.
- 3.Copy the ISO date for your database, API, or code.
About This Tool
Frequently Asked Questions
It is unambiguous (no US vs EU confusion), sorts correctly as text, and is the default in JSON, SQL, and most APIs.
YYYY-MM-DD is the date-only form of ISO 8601. The full standard also includes time (YYYY-MM-DDTHH:MM:SSZ).
Yes — months and days always use two digits: 2026-03-05, not 2026-3-5.