Question

Unix Time is defined as the number of seconds that have elapsed since when?

Answer 1

Unix Time is defined as the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC (Coordinated Universal Time). It is also known as Epoch Time or POSIX Time.

Answer 2

Unix Time is defined as the number of seconds that have elapsed since midnight Coordinated Universal Time (UTC) of January 1, 1970, not counting leap seconds. This is also known as the Unix epoch or Unix timestamp.