Six minutes has leaked away from electric clocks in ovens and radios since January. (newscientist.com)
A lot of electric clocks, such as those on many radios and ovens, still keep time by synchronizing themselves to the frequency of the mains electricity supply, rather than an inbuilt quartz crystal (which is more expensive) or by connected to a «time server» on the Internet (more expensive still). (fortune.com)
A master electric clock on the wall of the club approached 7:25. (si.com)