Is Time Running Out For NASA's Mars Opportunity Rover?

Since June 10, the 14-year-old Opportunity rover has been silent, presumably sleeping as thick dust clouds blocked the Sun from its solar cells. But now, that sky is clearing, and NASA is implementing a listening plan for the rover through January 2019.
Without power, the rover has likely experienced several faults. Among them, its mission clock may have stopped recording time accurately. To counteract this possibility, the rover’s mission team is both passively waiting for the rover to