2.system Display Date and Time Settings

the system actually provide display settings, is uses /etc/x11/xorg.conf

in recent linux, the file usually present in unusual cricumstatnce such as when cirtain Less
common graphic drivers are in use.

changing the file is usually for more advanced users.

Network Time Protocol

the Network Time Protocol is most popular and reliable protocol for setting local time by consulting established internet servers.

student:/tmp> $ xdpyinfo | grep dim
dimensions: 3200x1080 pixels (847x286 millimeters)