# timedatectl
               Local time: Po 2021-07-19 09:09:12 CEST
           Universal time: Po 2021-07-19 07:09:12 UTC 
                 RTC time: Po 2021-07-19 07:09:12     
                Time zone: Europe/Prague (CEST, +0200)
System clock synchronized: no                         
              NTP service: n/a                        
          RTC in local TZ: no
sudo service ntp status
● ntp.service - LSB: Start NTP daemon
     Loaded: loaded (/etc/init.d/ntp; enabled; vendor preset: enabled)
     Active: active (running) since Sun 2021-07-18 13:39:44 CEST; 19h ago
       Docs: man:systemd-sysv-generator(8)
    Process: 2295 ExecStart=/etc/init.d/ntp start (code=exited, status=0/SUCCESS)
      Tasks: 2 (limit: 38355)
     Memory: 4.2M
     CGroup: /system.slice/ntp.service
             └─2403 /usr/sbin/ntpd -p /var/run/ntpd.pid -g -u 108:114

čec 19 09:10:42 swed ntpd[2403]: Soliciting pool server 91.189.89.198
čec 19 09:10:43 swed ntpd[2403]: Soliciting pool server 78.108.102.237
čec 19 09:10:47 swed ntpd[2403]: Soliciting pool server 80.79.25.111
čec 19 09:10:58 swed ntpd[2403]: Soliciting pool server 2606:4700:f1::1
čec 19 09:11:04 swed ntpd[2403]: Soliciting pool server 213.192.54.227
čec 19 09:11:46 swed ntpd[2403]: Soliciting pool server 91.189.91.157
čec 19 09:11:47 swed ntpd[2403]: Soliciting pool server 162.159.200.123
čec 19 09:11:51 swed ntpd[2403]: Soliciting pool server 162.159.200.1
čec 19 09:12:05 swed ntpd[2403]: Soliciting pool server 2a02:8300:8000:4:214:5eff:fe7e:4bf
sudo ntpdate -dv ntp.ubuntu.com
19 Jul 09:17:59 ntpdate[15702]: ntpdate 4.2.8p12@1.3728-o (1)
Looking for host ntp.ubuntu.com and service ntp
host found : 91.189.91.157

transmit(91.189.91.157)
receive(91.189.91.157)

transmit(91.189.89.198)
receive(91.189.89.198)
transmit(91.189.89.199)
receive(91.189.89.199)
transmit(91.189.94.4)
receive(91.189.94.4)
transmit(91.189.91.157)
receive(91.189.91.157)
transmit(91.189.89.198)
receive(91.189.89.198)
transmit(91.189.89.199)
receive(91.189.89.199)
transmit(91.189.94.4)
receive(91.189.94.4)
transmit(91.189.91.157)
receive(91.189.91.157)
transmit(91.189.89.198)
receive(91.189.89.198)
transmit(91.189.89.199)
receive(91.189.89.199)
transmit(91.189.94.4)
receive(91.189.94.4)
transmit(91.189.91.157)
receive(91.189.91.157)
transmit(91.189.89.198)
receive(91.189.89.198)
transmit(91.189.89.199)
receive(91.189.89.199)
transmit(91.189.94.4)
receive(91.189.94.4)

server 91.189.91.157, port 123
stratum 2, precision -24, leap 00, trust 000
refid [17.253.34.123], root delay 0.072601, root dispersion 0.022842
transmitted 4, in filter 4
reference time:    e49f95da.88b22d51  Mon, Jul 19 2021  8:10:34.533
originate timestamp: e49f9799.c3bfcaab  Mon, Jul 19 2021  8:18:01.764
transmit timestamp:  e49fa5ad.783f6fe9  Mon, Jul 19 2021  9:18:05.469
filter delay:  0.12900  0.16852  0.13258  0.12903 
         0.00000  0.00000  0.00000  0.00000 
filter offset: -3603.75 -3603.75 -3603.75 -3603.75
         0.000000 0.000000 0.000000 0.000000
delay 0.12900, dispersion 0.00085
offset -3603.756703

server 91.189.89.198, port 123
stratum 2, precision -23, leap 00, trust 000
refid [17.253.34.253], root delay 0.001144, root dispersion 0.026627
transmitted 4, in filter 4
reference time:    e49f94ae.d4d65e78  Mon, Jul 19 2021  8:05:34.831
originate timestamp: e49f9799.eafb5aac  Mon, Jul 19 2021  8:18:01.917
transmit timestamp:  e49fa5ad.ab72fee1  Mon, Jul 19 2021  9:18:05.669
filter delay:  0.04778  0.04802  0.05469  0.04900 
         0.00000  0.00000  0.00000  0.00000 
filter offset: -3603.76 -3603.76 -3603.76 -3603.76
         0.000000 0.000000 0.000000 0.000000
delay 0.04778, dispersion 0.00099
offset -3603.762306

server 91.189.89.199, port 123
stratum 2, precision -24, leap 00, trust 000
refid [17.253.34.251], root delay 0.000992, root dispersion 0.036057
transmitted 4, in filter 4
reference time:    e49f9246.ac0959ff  Mon, Jul 19 2021  7:55:18.672
originate timestamp: e49f979a.1ea62825  Mon, Jul 19 2021  8:18:02.119
transmit timestamp:  e49fa5ad.dea94a67  Mon, Jul 19 2021  9:18:05.869
filter delay:  0.05392  0.04985  0.04982  0.04999 
         0.00000  0.00000  0.00000  0.00000 
filter offset: -3603.76 -3603.76 -3603.76 -3603.76
         0.000000 0.000000 0.000000 0.000000
delay 0.04982, dispersion 0.00017
offset -3603.762271

server 91.189.94.4, port 123
stratum 2, precision -23, leap 00, trust 000
refid [17.253.108.253], root delay 0.008163, root dispersion 0.032776
transmitted 4, in filter 4
reference time:    e49f932c.9e70ee70  Mon, Jul 19 2021  7:59:08.618
originate timestamp: e49f979a.557fa153  Mon, Jul 19 2021  8:18:02.333
transmit timestamp:  e49fa5ae.11d9d4fc  Mon, Jul 19 2021  9:18:06.069
filter delay:  0.05750  0.05984  0.05701  0.06279 
         0.00000  0.00000  0.00000  0.00000 
filter offset: -3603.75 -3603.75 -3603.75 -3603.75
         0.000000 0.000000 0.000000 0.000000
delay 0.05701, dispersion 0.00076
offset -3603.757055

19 Jul 09:18:06 ntpdate[15702]: step time server 91.189.89.198 offset -3603.762306 sec

This command helped

# ntpdate -u pool.ntp.org
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