Something similar happened in 2018. However, it was not a technical problem but a conflict between the power grid operators in Serbia and Kosovo. https://www.d

Something similar happened in 2018. However, it was not a technical problem but a conflict between the power grid operators in Serbia and Kosovo. https://www.dw.com/en/clocks-in-europe-are-running-late-because-of-the-kosovo-conflict/a-42867061 https://www.dw.com/en/clocks-in-europe-are-running-late-beca... I believe that if you adjusted your clock during the conflict you had to adjust it again when it was resolved as the resolution was to increase the frequency for a period to reverse the loss of frequency.