Unix

“Unix time (also known as Epoch time, Posix time,[1] seconds since the Epoch,[2] or UNIX Epoch time[3]) is a system for describing a

point in time⁠

. It is the number of

seconds⁠

that have elapsed since the Unix epoch, excluding

leap seconds⁠

The Unix epoch is 00:00:00

UTC⁠

on 1 January 1970 (an arbitrary date). Unix time is nonlinear with a leap second having the same Unix time as the second before it (or after it, implementation dependent), so that every day is treated as if it contains exactly 86400 seconds,[2] with no seconds added to or subtracted from the day as a result of positive or negative leap seconds.

Due to this treatment of leap seconds, Unix time is not a true representation of UTC.”

⁠

https://en.wikipedia.org/wiki/Unix_time⁠

⁠

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