Which is a time format used mainly on UNIX systems that uses integer values to represent data and time?

The time format used mainly on UNIX systems that uses integer values to represent date and time is “Epoch.” Specifically, this refers to Unix time (also known as POSIX time or Epoch time), which is a system for describing points in time. It is defined as the number of seconds that have elapsed since the Unix Epoch, excluding leap seconds – that is, since 00:00:00 Coordinated Universal Time (UTC), Thursday, 1 January 1970. Each unit in Unix time represents a single second.