Timestamp Converter
Convert Unix time and dates between formats and time zones, with daylight-saving gaps and repeats pointed out.
About this tool
Paste a Unix timestamp in seconds, milliseconds, microseconds or nanoseconds, an ISO 8601 date, or an HTTP date, and see it in UTC and any time zone, with ISO week, day of the year, relative time and the serial number spreadsheets use.
Plain numbers are read by their length, and the page says which unit it chose and why, so a millisecond value is never mistaken for seconds silently. Pick a unit to override it.
Dates without an offset are read in the time zone you choose. Around daylight-saving changes some local times never happen and others happen twice; both cases are explained, with every possible moment shown. Convert many at once in the Many tab and download them as CSV.