Reset Timezone

$ timedatectl

# list available timezone
$ timedatectl list-timezones
# Set the Timezone to GMT (UTC)
$ sudo timedatectl set-timezone Etc/UTC

# Set the hardware clock (RTC) to match the system time
sudo hwclock --systohc

# Enable and start the systemd-timesyncd service
sudo timedatectl set-ntp true
sudo systemctl enable systemd-timesyncd
sudo systemctl start systemd-timesyncd