CQ World Wide DX Contest (CQ WW)
The CQ WW is the largest and most popular amateur radio contest in the world, attracting participants globally. It occurs in two parts: the SSB (Single Sideband) contest on the last full weekend of October and the CW (Morse Code) contest on the last full weekend of November.
ARRL International DX Contest
Organized by the American Radio Relay League (ARRL), this contest focuses on contacting stations outside the participant’s country or region. It also has two modes: SSB in early March and CW in mid-February.
IARU HF World Championship
Held annually on the second full weekend of July, this contest is sponsored by the International Amateur Radio Union (IARU). It emphasizes global participation and allows operators to contact stations worldwide, including special IARU headquarters stations.