Using Date or Time unfortunately doesn't alter the system clock for good.

For example, authentication will sometimes fail if the system clock on the end user's computer is running slightly fast.

Microsoft Windows keeps the system real-time clock in local time.

When daylight savings time comes around, she resets the system clock.

Since a local system clock may be changed by a user, it is never used as a source of time.

The system clock keeps track of the passage of time.

It normally contain status values such as the system clock, Etc.

You know, your system clock is going to be you.

The infected computer may show an icon on the notification area adjacent to the system clock.

Your motherboard houses the system clock from which practically every program takes its time.