Hello, It looks like the European (ENTSOE) mains grid phase is now heading back to what it was before the large deviation of February. See my measurements at http://wwwhome.ewi.utwente.nl/~ptdeboer/misc/mains-2018.html The ENTSOE website doesn't mention this correction yet, other than as a future "step 2". One can wonder how useful this correction is, though: just last weekend, daylight savings time started in Europe, so most mains-driven clocks have probably been manually set to the correct time on that occasion. Those will soon be some 5 minutes fast... Regards, Pieter-Tjerk (PA3FWM)