Format guide

ISO 8601

ISO 8601 date/time string

ISO 8601 is the international standard for representing dates and times as strings: `2024-06-10T14:30:00Z` (UTC) or with explicit offset (`2024-06-10T14:30:00+02:00`). Unambiguous, sortable lexicographically, and the format every modern API uses (REST, GraphQL, JSON Schema). Standardized in 1988; the JavaScript `Date.toISOString()` and Python `datetime.isoformat()` both emit it.

How to open a ISO 8601 file

Any text editor or programming language. To parse: every language ships a function (`new Date(iso)` in JS, `datetime.fromisoformat(iso)` in Python 3.11+).

Primary use

Timezone-explicit timestamp exchange in APIs and data files.

Convert other formats to ISO 8601

Unix timestamp → ISO 8601

Convert ISO 8601 to other formats

ISO 8601 → Unix timestamp

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