Unix time is the number of seconds that have passed since the initial epoch defined as Tuesday 1 January 1970 00:00:00 UTC. It is used mostly in Unix-like and many other operating systems. People can check Unix time on most Unix systems by typing
date +%s on the command line.
- "The Open Group Base Specifications Issue 7, section 4.16 Seconds Since the Epoch". The Open Group. Retrieved 22 Jan 2017.