Fix dual boot time discrepancy

http://ubuntuhandbook.org/index.php/2016/05/time-differences-ubuntu-1604-windows-10/

1. Disable UTC and use Local Time in Ubuntu:
In previous Ubuntu editions, you can edit the config file /etc/default/rcS to disable UTC.
In Ubuntu 16.04, open terminal (Ctrl+Alt+T) and run the command below instead:

timedatectl set-local-rtc 1 --adjust-system-clock

To check out if your system uses Local time, just run:

timedatectl