Open the terminal (CTRL+alt+T) under the Ubuntu system and enter:
sudo apt-get install ntpdate // update local time under ubuntu16.04
sudo ntpdate time.windows.com
sudo hwclock --localtime --systohc //Update the local time to the hardware
Reboot
Open the terminal (CTRL+alt+T) under the Ubuntu system and enter:
sudo apt-get install ntpdate // update local time under ubuntu16.04
sudo ntpdate time.windows.com
sudo hwclock --localtime --systohc //Update the local time to the hardware
Reboot