The SonneMondSterne Festival (short SMS) is an open-air festival featuring electronic dance music held in Germany. The festival lasts three days and takes place on the second weekend of August in Thuringia at the Bleilochtalsperre near Saalburg-Ebersdorf. The first festival was in 1997 with 2,500 people. In 2018 more than 42.000 guests with over 240 acts and raving on the beach and in the clubtents. 47 hours of non-stop happiness.