Ontario QSO Party
1800Z, Apr 18 to 0300Z, Apr 19 and 1200Z-2000Z, Apr 19
Feld Hell Sprint
1800Z-2159Z, Apr 18
EA-QRP CW Contest
1700Z-1800Z, Apr 18 (10m) and 1800Z-1900Z, Apr 18 (15m) and 1900Z-2000Z, Apr 18 (20m) and 2000Z-2100Z, Apr 18 (40m) and 2100Z-2300Z, Apr 18 (80m) and 0700Z-0900Z, Apr 19 (40m) and 0900Z-1000Z, Apr 19 (20m) and 1000Z-1100Z, Apr 19 (15m) and 1100Z-1200Z, Apr 19 (10m)
Michigan QSO Party
1600Z, Apr 18 to 0400Z, Apr 19
World Time Zone Challenge
1200Z, Apr 18 to 1200Z, Apr 19
Georgia State Parks on the Air
1200Z, Apr 18 to 2359Z, Apr 19
CQMM DX Contest
0900Z, Apr 18 to 2359Z, Apr 19
QRP to the Field
0800-1800 local, Apr 18
Dutch PACCdigi Contest
0700Z to 1900Z, Apr 18
Worked All Provinces of China DX Contest
0600Z, Apr 18 to 0559Z, Apr 19
ES Open HF Championship
0500Z-0859Z, Apr 18
Texas State Parks on the Air
0000Z, Apr 18 to 2359Z, Apr 19
World Wide Holyland Contest
2100Z, Apr 17 to 2059Z, Apr 18
K1USN Slow Speed Test
2000Z-2100Z, Apr 17
Florida State Parks on the Air
1200Z-2359Z, Apr 17 and 1200Z-2359Z, Apr 18 and 1200Z-2359Z, Apr 19 and 1200Z-2359Z, Apr 20
NCCC Sprint
0230Z-0300Z, Apr 17
Weekly RTTY Test
0145Z-0215Z, Apr 17
NCCC FT4 Sprint
0100Z-0130Z, Apr 17
NTC QSO Party
1900Z-2000Z, Apr 16
CWops Test (CWT)
0700Z-0800Z, Apr 16
Calendar of ham radio contests
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