On Thu 2020-11-12T10:11:26-0800 Guy Harris hath writ:
I.e., that's a counter that started as 0 on January 1, 1970, 00:00:00 UTC, and that increments by 1 every second, rather than getting adjusted to conform to POSIX.
With the historical caveat that as of 1970 there was not yet any official document that specified the name UTC. Until 1974 UTC was jargon internal to time service bureaus. Most available sources of time used different terminology. -- Steve Allen <sla@ucolick.org> WGS-84 (GPS) UCO/Lick Observatory--ISB 260 Natural Sciences II, Room 165 Lat +36.99855 1156 High Street Voice: +1 831 459 3046 Lng -122.06015 Santa Cruz, CA 95064 https://www.ucolick.org/~sla/ Hgt +250 m