Microwaves Across Europe Are 6 Minutes Slow Due to a Serbia-Kosovo Grid Dispute

Power-connected clocks on appliances generally tell time by counting the rate of the electrical current, which in Europe is supposed to hold a constant frequency of 50Hz. If that frequency drops below 50Hz, connected appliance clocks will be slow, and if it rises above 50Hz, clocks will be fast. Since mid-January, clocks that are on the Continental Europe Power System, a synchronized area that reaches through 25 countries across the continent, have seen a deviation from grid-time based on an average frequency of 49.996 Hz.

Source: arstechnica.com