Running the continental grid at a higher frequency than normal added time to clocks.

[1van]

That's because clocks that are connected to an outlet often tell time by counting the rate of the electrical current, and on the Continental Europe Power System the clocks expect an average frequency of 50Hz. But between mid-January 2018 and early March, a grid dispute between Serbia and Kosovo resulted in 113GWh of unmet demand from Kosovo. Since Kosovo is part of the Continental Europe Power System, the unmet demand on the 25-country system led to a system-wide decline in frequency to an average frequency of 49.996Hz. That meant that clocks were counting down minutes too slowly, and, over three months, connected clocks around the continent lost six minutes.

Detalji: https://arstechnica.com/tech-policy/2018...en-clocks/

Ukratko: Prikljucivanjem Kosova na Evropsku mrezu poremetili su satove na elektricnim uredjajima