.BR gettimeofday (2)
and
.BR time (2),
-as well as setting timestamps on files, etc.
+as well as setting timestamps on files, and so on.
The system clock reports seconds and microseconds since a start point,
defined to be the POSIX Epoch: 1970-01-01 00:00:00 +0000 (UTC).
(One common implementation counts timer interrupts, once
.I Documentation/rtc.txt
in the Linux kernel source tree
+.SH COLOPHON
+This page is part of release 3.68 of the Linux
+.I man-pages
+project.
+A description of the project,
+information about reporting bugs,
+and the latest version of this page,
+can be found at
+\%http://www.kernel.org/doc/man\-pages/.