Timestamp Converter

Convert Unix timestamps (seconds, ms, µs) to dates and back, in any time zone — ISO 8601, RFC 2822 and relative time.

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Unix time now (seconds)

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Unix time now (milliseconds)

Timestamp → date

Timestamp or date

Waiting for input

Date and time

In time zone

How to use

Paste a Unix timestamp to see it as a date in your time zone, UTC and any zone you pick. The unit is detected from the number of digits — 10 for seconds, 13 for milliseconds, 16 for microseconds, 19 for nanoseconds — or choose it yourself.
You can also paste a date such as 2026-12-31T23:59:00Z or an HTTP date to get its timestamp.
Use Date → timestamp to turn a wall-clock time in any zone into seconds or milliseconds.

What is a Unix timestamp?

The number of seconds since 1 January 1970 00:00:00 UTC (the “epoch”), ignoring leap seconds. It's the same everywhere in the world — the time zone only matters when you show it as a date.
JavaScript and Java use milliseconds; most databases, Unix tools and PHP use seconds.
32-bit signed timestamps run out on 19 January 2038 (the “Year 2038 problem”).