The date and time change when the PC turns off. Does the date on your PC change every time you turn off the device? For example, it dates back to January 1, 2017.

The date and time change when the PC is turned off, what do I do?

This incident is generally caused by a battery weak of the motherboard from the PC. You need to change it. The battery is cheap and is the same as the one used in watches. Replace the battery and reconfigure the settings.

If the problem cannot be resolved by replacing the battery, the incident may have been caused by the circuit that powers the battery. If so, ask a technician for help if you are not a computer expert.

It may be, for example, that your PC is configured in a time zone other than your geographical location, so go to the configuration (on the date in the taskbar on the right) and reconfigure it.