⏰ Timestamp & Natural Date Converter

Using Unix Timestamp Converter

Turn a Unix timestamp from a log, database or API into a readable date, or turn a date into epoch seconds and milliseconds.

How to use it

1. Paste a timestamp or type a date such as 2026-09-13 14:30 JST; click Use Current Time (Now) for the present moment.
2. Seconds and milliseconds are detected automatically: numbers of 12 digits or more are read as milliseconds.
3. Use +15m, +1h, +1d, +7d, -1h or -1d to shift the time, for example to find when a 24-hour token expires.
4. Read Epoch Seconds, Epoch Milliseconds, Your Local Time, UTC and ISO 8601, and check the Multi-Zone Comparison.

Worked example

Input and settings

1700000000 +1d

Expected result

2023-11-15T22:13:20.000Z (ISO 8601), one day after 1700000000.

Limits and common mistakes

• Every bare number is treated as a timestamp, so 2026 means 33 minutes after 1 January 1970; write 2026-01-01 for a date.
• Timezone abbreviations are fixed offsets: EST is always UTC−5 and EDT UTC−4, whatever the season.
• Months in +/− shifts are 30 days and years 365 days, so a monthly shift drifts from calendar months.
• Dates without a zone are read as UTC, not your local time.

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