Unix Timestamp Converter

Convert Unix seconds or milliseconds to local, UTC, and ISO dates and back.

Unix timestamp

Seconds allow up to 3 decimal places; milliseconds must be whole numbers. Leap seconds are not counted.

Local date and time

Local time—UTC—

ISO 8601—

Time zone—

Seconds—

Milliseconds—

Browser time zone: . Elapsed time includes daylight-saving changes. Clock times skipped during a change are invalid.

When a clock time occurs twice