$ timedatectl status
      Local time: Fri 2018-08-31 13:42:42 CST
  Universal time: Fri 2018-08-31 05:42:42 UTC
        RTC time: n/a
       Time zone: Asia/Shanghai (CST, +0800)
     NTP enabled: n/a
NTP synchronized: yes
 RTC in local TZ: no
      DST active: n/a

$ timedatectl set-timezone Asia/Shanghai # Set system timezone to Shanghai

$ timedatectl list-timezones # List all timezones

$ timedatectl set-local-rtc 1 # Adjust hardware clock to match local clock, 0 means set to UTC time