What is a Unix timestamp?

The number of seconds elapsed since 1 January 1970 00:00:00 UTC, ignoring leap seconds. Many systems use milliseconds instead, which is why the values are 1000 times larger.

Seconds or milliseconds — how does it tell?

By magnitude. Ten-digit values are treated as seconds, thirteen-digit values as milliseconds, and you can override the choice.

How are timezones handled?

Conversion uses your browser's timezone database, including daylight saving rules for the date in question.

What is the year 2038 problem?

Systems storing timestamps in a signed 32-bit integer overflow on 19 January 2038. Modern 64-bit storage is unaffected.

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Timestamp & Epoch Converter

Unix epoch to date, and date to epoch — across timezones, live.

Current timestamp

1789912187

Timestamp → Date

TimestampUnit

UTC

20 Sept 2026, 13:49:47 UTC

Your local timezone (UTC)

20 Sept 2026, 13:49:47 UTC

Extra timezone

Europe/Paris

20 Sept 2026, 15:49:47 CEST

ISO 8601

2026-09-20T13:49:47.000Z

RFC 2822

Sun, 20 Sep 2026 13:49:47 +0000

Relative

0 seconds ago

Date → Timestamp

Date & time

Epoch (seconds)

1789912187

Epoch (milliseconds)

1789912187000

ISO 8601

2026-09-20T13:49:47.000Z

RFC 2822

Sun, 20 Sep 2026 13:49:47 +0000

The year-2038 problem: systems that store timestamps as a signed 32-bit integer will overflow on 19 January 2038 03:14:07 UTC. Modern 64-bit storage (used by most current databases and languages) is unaffected.

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This tool is free and unrelated to what we sell. FairSoftware supplies genuine one-off Microsoft licences — Office licences and Windows licences, delivered by email.

About this tool

Convert Unix epoch values into readable dates and back again. Seconds and milliseconds are detected automatically, the result is shown in UTC, your local timezone and any other zone you pick, and ISO 8601, RFC 2822 and relative formats are all produced together. Useful whenever a log file, API response or database column hands you a bare number.

How to use the Free Timestamp & Epoch Converter

Paste a Unix timestamp — seconds or milliseconds, detected for you.
Read the date in UTC, in your local timezone and in the extra timezone you choose.
Or switch to the other direction and pick a date and time to get its timestamp.
Copy whichever format you need: ISO 8601, RFC 2822 or the raw epoch value.
Use the live clock at the top for the current timestamp.

Frequently asked questions

What is a Unix timestamp?: The number of seconds elapsed since 1 January 1970 00:00:00 UTC, ignoring leap seconds. Many systems use milliseconds instead, which is why the values are 1000 times larger.
Seconds or milliseconds — how does it tell?: By magnitude. Ten-digit values are treated as seconds, thirteen-digit values as milliseconds, and you can override the choice.
How are timezones handled?: Conversion uses your browser's timezone database, including daylight saving rules for the date in question.
What is the year 2038 problem?: Systems storing timestamps in a signed 32-bit integer overflow on 19 January 2038. Modern 64-bit storage is unaffected.

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