Most unix kernels measure time in seconds since TheEpoch, usually the first moment of 1970 in GMT

As a DateStamp, that is 19700101.000000000000000000000000000000000

Most Unix systems on the internet synchronize to the millisecond, although they may count many more subintervals -- a Gigahertz machine should know which nanosecond some interrupt happened.


ThirtytwoBitTime when treated as a SignedInteger counting seconds since 19700101.000000 rolls over and becomes negative at 20380119.031408 resulting in a date early in the TwentiethCentury 19011213.204552

Apparently Eight''''''LeapSecond''''''s intervened between those two dates -- as far as Unix Knows Today