"...summer’s biggest HF competition: the IARU HF World Championship. This 24 hour long contest is the highlight of the summer HF contesting season, affording plenty of opportunities to work DX from all around the globe.."
IARU HF World Championship begins at 1200 UTC on Saturday, July 9 and goes until 1200 UTC on Sunday, July 10.
If interested, full details here:
http://www.arrl.org/iaru-hf-championshipKnow your Zones:
And you thought the Maidenhead grid stuff was confusing: