The International Amateur Radio Union (IARU) HF World Championships begin at 1200 UTC on Saturday, July 8, 2023, and run through 1159 UTC on Sunday, July 9.
The International Amateur Radio Union (IARU) HF World Championships begin at 1200 UTC on Saturday, July 8, 2023, and run through 1159 UTC on Sunday, July 9.
https://www.arrl.org/special-event-call-signs maybe