Absolute beginner, after installation I simply correct the clock. I can find the clock personalization, but non the way to fix the day and time
Thank you for attention
Did you try Manjaro Settings Manager?
sudo date --set="Wed, 17 Aug 2022 12:34:56 -0600"
Or set hardware clock and sync with system clock:
hwclock --set --date="9/18/22 19:23:00"
hwclock --hctosys
You also need to set timezone correctly.
Take a gander at the Time and Date section of the Manjaro wiki.
If the above doesn’t help, what is the output from the following commands:
timedatectl status
systemctl status systemd-timesyncd