$ uptime
 08:56:24 up 16:29,  1 user,  load average: 0.19, 0.30, 0.18
$ systemctl status systemd-timesyncd.service
● systemd-timesyncd.service - Network Time Synchronization
   Loaded: loaded (/lib/systemd/system/systemd-timesyncd.service; enabled; vendor preset: enabled)
   Active: active (running) since Thu 2018-07-19 16:26:51 CEST; 16h ago
     Docs: man:systemd-timesyncd.service(8)
 Main PID: 685 (systemd-timesyn)
   Status: "Synchronized to time server XXX.XXX.XXX.XXX."
    Tasks: 2 (limit: 4915)
   Memory: 2.5M
   CGroup: /system.slice/systemd-timesyncd.service
           └─685 /lib/systemd/systemd-timesyncd

Jul 19 16:26:51 HOST systemd[1]: Starting Network Time Synchronization...
Jul 19 16:26:51 HOST systemd[1]: Started Network Time Synchronization.
Jul 19 16:27:21 HOST systemd-timesyncd[685]: Synchronized to time server XXX.XXX.XXX.XXX
$ systemctl status chronyd.service
● chrony.service - chrony, an NTP client/server
   Loaded: loaded (/lib/systemd/system/chrony.service; enabled; vendor preset: enabled)
   Active: active (running) since Thu 2018-07-19 16:26:51 CEST; 16h ago
     Docs: man:chronyd(8)
           man:chronyc(1)
           man:chrony.conf(5)
 Main PID: 813 (chronyd)
    Tasks: 1 (limit: 4915)
   Memory: 3.0M
   CGroup: /system.slice/chrony.service
           └─813 /usr/sbin/chronyd

Jul 19 16:26:51 HOST systemd[1]: Starting chrony, an NTP client/server...
Jul 19 16:26:51 HOST chronyd[813]: chronyd version 3.3 starting (+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP +SCFILTER +SIGND +ASYNCDNS +SECHASH +IPV6 -DEBUG)
Jul 19 16:26:51 HOST chronyd[813]: Frequency -1.782 +/- 0.287 ppm read from /var/lib/chrony/chrony.drift
Jul 19 16:26:51 HOST systemd[1]: Started chrony, an NTP client/server.
Jul 19 16:27:00 HOST chronyd[813]: Selected source XXX.XXX.XXX.XXX