What is the Unix timestamp?
Unix time is seconds (and milliseconds) since 1970-01-01 00:00:00 UTC. This value updates every second.
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Unix timestamp
Seconds since the Unix epoch
Unix time counts seconds (and often milliseconds) since 1970-01-01 00:00:00 UTC. It is the same number everywhere at a given instant—timezones do not shift the timestamp, only how you display local clocks.
This page updates every second so you can copy a current value for debugging.
Where it shows up
APIs, databases, JWT claims, and file systems use Unix time heavily. Be aware of the Year 2038 concern for legacy 32-bit second counters; modern 64-bit timestamps are the norm in new software.
Compare with UTC time for a human-readable form of the same timeline.
Learn more
Guide: timezone, UTC, and Unix time.
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Frequently Asked Questions
What is Unix time?
It counts seconds since the Unix epoch (1 January 1970 UTC), ignoring leap seconds in typical JavaScript implementations.
Seconds vs milliseconds
The main value is seconds. The detail line shows milliseconds, which many JavaScript APIs use.
Does timezone change the timestamp?
No. The epoch offset is UTC-based. Timezone only changes how you display a clock.
Where is this used?
APIs, databases, cookies, and logs often store Unix timestamps.
Year 2038
Legacy 32-bit systems had a 2038 limit. Modern 64-bit and JavaScript millisecond times are far beyond that.