Unix time is a system for describing points in time, defined as the number of seconds elapsed since midnight Coordinated Universal Time (UTC) of 1 January 1970.
Unix time is not easy readable for ordinary people because it’s just a number, infinitely increasing in time. There are useful online tools that solve this problem such as unix time converter and many others (You can see them on unix-time.com on the bottom of the page)
Unix time is widely used not only on Linux, Unix, BSD or other unix-like operating systems but also in many other computing systems. It is neither a linear representation of time nor a true representation of UTC (though it is frequently mistaken for both) as the times it represents are UTC but it has no way of representing UTC leap seconds (e.g. December 31, 1998 23:59:60).
