localtime — Local time zone configuration file
configures the system-wide time zone of the local
system that is used by applications for presentation
to the user. It should be an absolute or relative
symbolic link pointing to
/usr/share/zoneinfo/, followed by
a time zone identifier such as
Etc/UTC. The resulting link should
lead to the corresponding binary
time zone data for the configured time zone.
As the time zone identifier is extracted from
the symlink target name of
/etc/localtime this file may not
be a normal file or hardlink.
The time zone may be overridden for individual programs by using the TZ environment variable. See environ(7).
You may use timedatectl(1) to change the settings of this file from the command line.