On 9/26/2021 10:51 PM, Brent Boshart wrote:

...The original poster was referring to a
circumstance where the computer is not connected to a network (internet).

NEVER?

If the PC or laptop can be connected to a network every few days (maybe with a wi-fi dongle), the network time sync software could accurately set it then. Most PC clocks are good enough to maintain fairly accurate time over several days.

Or, as The he said, a GPS dongle would do the job. They're inexpensive.

Worst case: Set the PC clock manually by watching an analog clock on a cell phone, and clicking the PC clock button when the cell clock second hand passes 12.

--- Mike