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Glossary Data & Encoding

Unix timestamp

A Unix timestamp is the number of seconds since 00:00:00 UTC on 1 January 1970, the "Unix epoch", used by computers as a simple way to store a moment in time.

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In more detail

Because it counts from a fixed UTC moment, it is the same everywhere regardless of time zone. JavaScript and some APIs use milliseconds instead, so a 13-digit value is milliseconds. Systems storing it in a signed 32-bit number will overflow on 19 January 2038 (the "Year 2038 problem").

Example

1700000000 is 14 November 2023, 22:13:20 UTC. Convert with the Unix Timestamp Converter.

Try these tools

Unix Timestamp Converter

Convert Unix epoch timestamps to human-readable dates and back, live, in your browser.

See also

  • Glossary JWT
    A JWT (JSON Web Token) is a compact, signed token made of three Base64URL parts that carries claims such as who a user is and when the.
  • Glossary Timestomping
    Timestomping is deliberately changing a file's timestamps to hide when it was created or modified.
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