... for the purpose of this blog post I’ll assume that each member state has to decide whether they will “spring forward” one last time on March 28th 2021, then

... for the purpose of this blog post I’ll assume that each member state has to decide whether they will “spring forward” one last time on March 28th 2021, then staying in permanent “summer time”, or “fall back” one last time on October 31st 2021, then staying in permanent “winter time”. Too bad this didn't come true ...