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QuickUtila

Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates. Paste a timestamp in seconds or milliseconds to see the date in UTC and your local time, or pick a date and time to get its timestamp.

Detected: seconds
Unit
Date and time (UTC)
2023-11-14 22:13:20UTC

Tuesday, November 14, 2023 at 22:13:20 UTC

ISO 8601 (UTC)
2023-11-14T22:13:20.000Z
Your local time
—
Seconds
1700000000
Milliseconds
1700000000000

Converted in your browser. UTC is shown alongside your local time so results are never ambiguous.

What Is a Unix Timestamp?

A Unix timestamp is the number of seconds that have passed since 00:00:00 UTC on January 1, 1970 — the “Unix epoch”. Because it is a single number with no time zone, it is widely used by computers, databases and APIs to store moments in time.

Many systems, including JavaScript, use milliseconds instead of seconds. A 13-digit timestamp is almost always in milliseconds; a 10-digit one is in seconds.

Formula
Date = January 1, 1970 00:00:00 UTC + Timestamp seconds
Example
  1. 11,700,000,000 seconds after the epoch
  2. 2= 19,675 days, 22 hours, 13 minutes and 20 seconds

Therefore: 1700000000 is Tuesday, November 14, 2023 at 22:13:20 UTC.

Notable Timestamps

Timestamp (seconds)Date and time (UTC)
0January 1, 1970 00:00:00
1000000000September 9, 2001 01:46:40
1700000000November 14, 2023 22:13:20
2000000000May 18, 2033 03:33:20
2147483647January 19, 2038 03:14:07 (32-bit limit)

When Is a Unix Timestamp Converter Useful?

  • Debugging code and APIs
  • Reading database records
  • Inspecting log files
  • Server and cron schedules
  • Checking token expiry times
  • Comparing times across time zones

Frequently Asked Questions

Yes. A Unix timestamp always counts from the epoch in UTC. Converting it to local time only changes how it is displayed, not the moment it represents.

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