$ uptime
 09:25:40 up 2 min,  4 users,  load average: 0.68, 0.31, 0.12
$ 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 Mon 2018-07-23 09:23:02 CEST; 2min 47s ago
     Docs: man:systemd-timesyncd.service(8)
 Main PID: 658 (systemd-timesyn)
   Status: "Synchronized to time server XXX.XXX.XXX.XXX."
    Tasks: 2 (limit: 4915)
   Memory: 2.5M
   CGroup: /system.slice/systemd-timesyncd.service
           └─658 /lib/systemd/systemd-timesyncd

Jul 23 09:23:01 HOST systemd[1]: Starting Network Time Synchronization...
Jul 23 09:23:02 HOST systemd[1]: Started Network Time Synchronization.
Jul 23 09:23:32 HOST systemd-timesyncd[658]: 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 Mon 2018-07-23 09:23:02 CEST; 2min 53s ago
     Docs: man:chronyd(8)
           man:chronyc(1)
           man:chrony.conf(5)
  Process: 965 ExecStartPost=/usr/lib/chrony/chrony-helper update-daemon (code=exited, status=0/SUCCESS)
  Process: 906 ExecStart=/usr/sbin/chronyd $DAEMON_OPTS (code=exited, status=0/SUCCESS)
 Main PID: 956 (chronyd)
    Tasks: 1 (limit: 4915)
   Memory: 2.7M
   CGroup: /system.slice/chrony.service
           └─956 /usr/sbin/chronyd

Jul 23 09:23:02 HOST systemd[1]: Starting chrony, an NTP client/server...
Jul 23 09:23:02 HOST chronyd[956]: chronyd version 3.3 starting (+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP +SCFILTER +SIGND +ASYNCDNS +SECHASH +IPV6 -DEBUG)
Jul 23 09:23:02 HOST chronyd[956]: Frequency -2.374 +/- 0.084 ppm read from /var/lib/chrony/chrony.drift
Jul 23 09:23:02 HOST systemd[1]: Started chrony, an NTP client/server.
Jul 23 09:23:09 HOST chronyd[956]: Selected source XXX.XXX.XXX.XXX