Thursday the 7th from 18 UTC to 20:30 UTC the Royal Danish Academy of Music has the opening concert of the Pulsar festival in Copenhagen. Part of the opening is the ON/OFF concert that is performance with students of the academy playing together with ham radio operators and Morse code celebrating communication in different forms but with focus on radio and morse code.
One of the stations will be calling CQ OZ1ONOFF on 40m CW around 18:30 UTC directly from the scene.
If you hear the CQ please feel free to respond and get a short QSO.
During the festival from the 7th to the 13th the callsign will also be activated by danish hams.
QSL info will be available on qrz.com.
https://english.dkdm.dk/Whats-On/Whats-On/2019/03-2019/PULSAR-aabningskoncert