how to change system time in xubuntu?

Question

I need to change system time and date on my xubuntu to do some QA testing does anyone know how to do it? I tried going into system manager -> time and date setting every time i change the time it keeps going back to current time.

Answer 1

This works for me on Ubuntu 18.04

• Disable the NTP server

  sudo timedatectl set-ntp false
  sudo timedatectl set-time "2019-12-30 $(date +%R:%S)"
  

• The result.

  emmet@ansmachine:~$ date
  Mon Des 30 05:08:21 CET 2019
  emmet@ansmachine:~$ date
  Mon Des 30 05:08:22 CET 2019
  emmet@ansmachine:~$ date
  Mon Des 30 05:08:23 CET 2019
  

  If you want to go back to original dates (pre-changes), just enable the NTP once again.

  sudo timedatectl set-ntp true
  

Answer 2

solve it. I had to install the ntp setting first to prevent the system to automatically change time and date.

sudo apt-get install ntp

unlock the date system -> change to manual -> then it works