Timestamps

What it does

Type a Unix timestamp and see it as a date, or type a date and get its timestamp. Every result is shown at once: the time in your chosen zone, the time in UTC, both ISO 8601 forms, how long ago or how far ahead it is, and the timestamp in seconds and in milliseconds. Each has its own Copy.

The current time is shown alongside and updates every second, so the timestamp for “now” is always one click away.

How to use it

1. Type or paste into the input pane. These all work:
   • a timestamp in seconds, milliseconds, microseconds or nanoseconds: 1700000000
   • an ISO date, with or without a time and zone: 2026-11-12 14:30, 2026-11-12T14:30:00-05:00
   • a US date: 11/12/2026 2:30 PM (month first)
2. Choose a time zone if you want something other than your device’s own. The choice is remembered.
3. Press Copy beside the form you need.

Use the current time fills the input with the timestamp for this second, which is a quick way to see today’s date in another zone.

Questions

What is a Unix timestamp?

The number of seconds since midnight UTC on 1 January 1970, not counting leap seconds. It is one number that means the same instant everywhere, which is why logs, databases and APIs use it. 1700000000 is 14 November 2023 at 22:13:20 UTC.

How does the tool know whether my number is in seconds or milliseconds?

By its length. Up to 11 digits is read as seconds, 12 to 14 as milliseconds, 15 to 17 as microseconds and longer as nanoseconds. A timestamp in seconds does not reach 12 digits until the year 5138, so the guess is safe for real data. The input pane says which unit was used.

Which time zone is a date read in?

A date that carries its own zone, such as 2026-11-12T14:30:00Z or one ending in -05:00, is read as written. A date with no zone is read as clock time in the zone chosen above, which starts as the zone of your device.

Does it account for daylight saving time?

Yes. The offset is worked out for the date in question, not for today, so a July date in New York is shown at UTC−04:00 and a January date at UTC−05:00. A clock time that was skipped when the clocks went forward is moved forward by the same amount, so 02:30 is read as 03:30. A clock time that happened twice when they went back is read as the first of the two.

What is the year 2038 problem?

Systems that store the timestamp as a signed 32-bit number run out of room at 2147483647, which is 19 January 2038 at 03:14:07 UTC. One second later the number wraps round to a date in 1901. This tool uses larger numbers and is not affected, so you can use it to check dates past that point.