ISO 8601 Date Converter
Convert dates to and from ISO 8601 format — the international standard for date and time representation.
ISO 8601 Formats Reference
| Date | 2024-01-15 | YYYY-MM-DD |
| Date & Time | 2024-01-15T10:30:00 | YYYY-MM-DDTHH:mm:ss |
| With UTC | 2024-01-15T10:30:00Z | Z = UTC timezone |
| With offset | 2024-01-15T10:30:00+05:30 | ±HH:MM offset |
| With ms | 2024-01-15T10:30:00.000Z | Milliseconds |
| Week date | 2024-W03-1 | Year-Week-Day |
| Ordinal | 2024-015 | Year-DayOfYear |
| Duration | P1Y2M3DT4H5M6S | Period: 1yr 2mo 3d 4h 5m 6s |
| Interval | 2024-01-01/2024-12-31 | Start/End |
What is ISO 8601?
ISO 8601 is an international standard for representing dates and times. Published by the International Organization for Standardization (ISO), it defines an unambiguous, internationally agreed-upon format that eliminates confusion caused by regional date format variations. The most common ISO 8601 format is YYYY-MM-DDTHH:mm:ssZ (e.g., 2024-01-15T10:30:00Z).
ISO 8601 is the standard used by REST APIs (RFC 3339, a profile of ISO 8601), HTML input[type=datetime-local], JavaScript's Date.toISOString(), JSON serialization in most frameworks, database timestamps, and HTTP headers. It sorts lexicographically (alphabetically) in the same order as chronologically, making it ideal for storing dates as strings in databases and logs.