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set-local-rtc [BOOL]
Takes a boolean argument. If "0", the system is configured to
maintain the RTC in universal time. If "1", it will maintain the
RTC in local time instead. Note that maintaining the RTC in the
local timezone is not fully supported and will create various
problems with time zone changes and daylight saving adjustments. If
at all possible, keep the RTC in UTC mode. Note that invoking this
will also synchronize the RTC from the system clock, unless
--adjust-system-clock is passed (see above). This command will
change the 3rd line of /etc/adjtime, as documented in hwclock(8).

(shell) timedatectl status
      Local time: 日 2017-04-23 00:37:33 CST
  Universal time: 六 2017-04-22 16:37:33 UTC
        RTC time: 日 2017-04-23 00:37:33
       Time zone: Asia/Taipei (CST, +0800)
 Network time on: yes
NTP synchronized: yes
 RTC in local TZ: yes

Warning: The system is configured to read the RTC time in the local time zone.
         This mode can not be fully supported. It will create various problems
         with time zone changes and daylight saving time adjustments. The RTC
         time is never updated, it relies on external facilities to maintain it.
         If at all possible, use RTC in UTC by calling
         'timedatectl set-local-rtc 0'.