What is a Unix timestamp?

A Unix timestamp is the number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970 (the Unix epoch). It is timezone-independent and widely used in programming and databases.

What is the maximum Unix timestamp?

The maximum 32-bit signed Unix timestamp is 2,147,483,647, which corresponds to 03:14:07 UTC on 19 January 2038. This is the Y2K38 problem. 64-bit timestamps extend this by billions of years.

Can I convert negative timestamps?

Yes. Negative timestamps represent dates before the Unix epoch (before 1 January 1970). For example, -86400 is 31 December 1969.

Why is the date thousands of years in the future?

The value is probably in milliseconds. This page reads the number as seconds, so a 13-digit value such as 1700000000000 lands tens of thousands of years ahead. The tool warns for values of 100,000,000,000 or more; switch to the Milliseconds mode or divide by 1000.

Unix timestamp to date

Enter a Unix timestamp (seconds since 1 January 1970 UTC) to see the corresponding date and time in UTC, your local timezone, and as a relative time string.

Enter a value above to convert

MODE

Runs entirely in your browser

How it works

The tool multiplies the number by 1000 and builds a JavaScript Date from it, then prints that moment with toUTCString(), toISOString() and toLocaleString(). For example, 1700000000 is Tue, 14 Nov 2023 22:13:20 GMT. The Local row uses your browser's time zone, labelled with its IANA name such as Europe/London, and the IANA rules built into the browser decide the offset and daylight saving time for that date.

Processing runs in your browser

Timestamps are converted entirely in your browser tab. Our servers are not involved at any point.

Related operations

For working out the gap between any two dates, try the date calculator. To find an exact age in years, months, and days, use the age calculator. For aligning timestamps across regions, see the timezone converter.

Frequently asked questions

What is a Unix timestamp?: A Unix timestamp is the number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970 (the Unix epoch). It is timezone-independent and widely used in programming and databases.
What is the maximum Unix timestamp?: The maximum 32-bit signed Unix timestamp is 2,147,483,647, which corresponds to 03:14:07 UTC on 19 January 2038. This is the Y2K38 problem. 64-bit timestamps extend this by billions of years.
Can I convert negative timestamps?: Yes. Negative timestamps represent dates before the Unix epoch (before 1 January 1970). For example, -86400 is 31 December 1969.
Why is the date thousands of years in the future?: The value is probably in milliseconds. This page reads the number as seconds, so a 13-digit value such as 1700000000000 lands tens of thousands of years ahead. The tool warns for values of 100,000,000,000 or more; switch to the Milliseconds mode or divide by 1000.

Last reviewed September 30, 2026

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