Unix time is a system for representing a point in time. It is the number of seconds that have elapsed since January 1st, 1970 00:00:00 UTC.

Is Unix time in seconds or milliseconds?

Encoding time as a number

Unix time is a single signed number that increments every second, which makes it easier for computers to store and manipulate than conventional date systems. Interpreter programs can then convert it to a human-readable format. The Unix epoch is the time 00:00:00 UTC on 1 January 1970.

Is Unix epoch in seconds?

The Unix epoch (or Unix time or POSIX time or Unix timestamp) is the number of seconds that have elapsed since January 1, 1970 (midnight UTC/GMT), not counting leap seconds (in ISO 8601: 1970-01-01T00:00:00Z).