-units. The "offset" field indicates the offset from Jan 01 1970 to the
-zero of value of the clock, in (1/freq) units. If the "offset" field is
-not present, it is assigned the 0 value.
+units. The "offset" field indicates the offset from POSIX.1 Epoch,
+1970-01-01 00:00:00 +0000 (UTC), to the zero of value of the clock, in
+(1/freq) units. If the "offset" field is not present, it is assigned the
+0 value.