That means Warning Day. And that’s today. It’s a national holiday or something. So don’t say I didn’t warn you.
And this, I believe, is what the warning text will say (in German): OMG we’re all going to die!
All mobile phones in Germany to receive alerts on Warning Day on December 8.
Germany’s first official Warntag took place on September 10, 2020, but was declared a failure after people received warning-app messages half an hour late. Sending emergency messages to all people, and not just those registered with an emergency app, was a step planned by the German government following the 2021 floods across North Rhine-Westphalia and the Rhineland-Palatinate that claimed the lives of more than 180 people.