For the first time in decades, all German disaster warning systems will be tested.

 The Interior Ministry in Berlin and the capitals of Germany’s federal states recently decided to introduce an annual Warning Day on the second Thursday in September. 

The first one is scheduled to happen on September 10th, 2020, starting at 11:00 a.m and finishing around 11:20am

.https://www.bundesregierung.de/breg-de/aktuelles/warntag2020-1780552