Proper noun
Unix time
A system for describing instants in time, defined as the number of seconds that have elapsed since 00:00:00 Coordinated Universal Time (UTC), Thursday, 1 January 1970, not counting leap seconds, used in Unix and many other operating systems.
UNIX time
Alternative form of Unix time
For example, Unix -based computer systems use the UTC-based Unix time internally. Source: Internet
Leap seconds in Unix time are commonly implemented by repeating the last second of the day. Source: Internet
Many computer systems internally store points in time in Unix time format or some other system time format. Source: Internet
Unix time gives date and time as the number of seconds since January 1, 1970, and Microsoft's FILETIME as multiples of 100ns since January 1, 1601. Source: Internet