Unix Timestamp ⇔ Date & Time

What is a Unix timestamp?

A Unix timestamp (epoch seconds) represents a moment as the number of seconds elapsed since 00:00:00 UTC on January 1, 1970. It is widely used in programs, databases, and API logs. It is sometimes expressed in milliseconds (thousandths of a second), as in JavaScript's default.

How to use

• ① Enter a number to see the date in local time, UTC, and ISO 8601. Milliseconds are detected automatically from the digit count, and you can also set it manually with the “Seconds / Milliseconds” toggle.
• ② Enter a date (such as 2026-08-24 15:00 or ISO 8601) to see the corresponding Unix seconds and milliseconds.
• Get current time: fills both fields with the timestamp for right now.

The date you enter is interpreted in your browser's time zone (local time). If you include a Z or an offset in ISO 8601 format, that is honored instead.

Seconds vs. milliseconds

A current Unix timestamp is 10 digits in seconds (e.g. 1756012800) and 13 digits in milliseconds (e.g. 1756012800000). You can tell them apart by length, but when in doubt use the “Seconds / Milliseconds” toggle. JavaScript's Date.now() returns milliseconds, while most server logs and databases use seconds.

Get the current Unix time in each language

• JavaScript: Math.floor(Date.now() / 1000) (seconds) / Date.now() (milliseconds)
• Python: import time; int(time.time())
• PHP: time()
• Ruby: Time.now.to_i
• Shell (Unix/Linux/macOS): date +%s
• MySQL: SELECT UNIX_TIMESTAMP(); — convert back with FROM_UNIXTIME(seconds)

Time zones

A Unix timestamp is an absolute moment in UTC and carries no time-zone information. The same number shows a different wall-clock time depending on whether you read it in UTC or your local zone. This tool displays local time and UTC side by side so you can spot the offset.