About Date Format Converter

Show the same instant in ISO, RFC-2822, epoch, DD/MM/YYYY and more. Part of the DevTools Surf developer suite. Browse more tools in the Date / Time collection.

Use Cases

• Translate a database timestamp for a customer-facing email
• Convert between ISO and locale formats for report exports
• Double-check timezone assumptions before a scheduled job
• Normalize mixed-format timestamps in imported CSVs

Tips

• Accepts ISO 8601, RFC 2822, epoch seconds, epoch millis
• All output formats shown at once — no need to switch modes
• UTC times are displayed — check your timezone for local equivalents

Fun Facts

• ISO 8601 dates sort alphabetically into chronological order, which is why they're the de-facto standard for filenames and logs.
• The ISO 8601 standard also defines week numbering — week 1 is the week containing the first Thursday of January, which occasionally puts January 1st in 'week 53' of the previous year.
• RFC 2822 date format requires day-of-week abbreviations (Mon, Tue...) but most parsers accept dates without them — the spec says they're optional for parsing but required for generation.

FAQ

Which formats does it show?

ISO 8601 (2024-01-15T10:30:00Z), RFC 2822, Unix epoch (seconds and ms), DD/MM/YYYY, MM/DD/YYYY, and locale-specific (en-US, de-DE, fr-FR).

Does it handle timezones?

Yes — input in any timezone, output in UTC or another timezone. DST transitions are handled correctly.

What about relative dates?

Input 'yesterday', '2 days ago', 'next Monday' — the tool parses natural language. For precise dates, use absolute format.

Why do different services use different formats?

Historical and ecosystem reasons. RFC 2822 for email. ISO 8601 for APIs. Unix epoch for distributed systems. The tool shows all so you can pick per context.