| Click on the link to view detailed information about a contest. | |
| Weekly Contests | |
| K1USN Slow Speed Test | 0000Z-0100Z, Monday ( May 4) |
| ICWC Medium Speed Test | 1300Z-1400Z, Monday ( May 4) |
| OK1WC Memorial | 1630Z-1729Z, Monday ( May 4) |
| ICWC Medium Speed Test | 1900Z-2000Z, Monday ( May 4) |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Tuesday ( May 5) |
| ICWC Medium Speed Test | 0300Z-0400Z, Tuesday ( May 5) |
| Phone Weekly Test | 0230Z-0300Z, Wednesday ( May 6) |
| A1Club AWT | 1145Z-1300Z, Wednesday ( May 6) |
| CWops Test | 1300Z-1400Z, Wednesday ( May 6) |
| Mini-Test 40 | 1700Z-1759Z, Wednesday ( May 6) |
| Mini-Test 80 | 1800Z-1859Z, Wednesday ( May 6) |
| CWops Test | 1900Z-2000Z, Wednesday ( May 6) |
| CWops Test | 0300Z-0400Z, Thursday ( May 7) |
| CWops Test | 0700Z-0800Z, Thursday ( May 7) |
| NCCC FT4 Sprint | 0100Z-0130Z, Friday ( May 8) |
| Weekly RTTY Test | 0145Z-0215Z, Friday ( May 8) |
| NCCC Sprint | 0230Z-0300Z, Friday ( May 8) |
| K1USN Slow Speed Test | 2000Z-2100Z, Friday ( May 8) |
| May 4 - 10 | |
| MIE 33 Contest | 2300Z, May 4 to 0300Z, May 5 |
| ARS Spartan Sprint | 0000Z-0200Z, May 5 |
| VHF-UHF FT8 Activity Contest | 1700Z-2100Z, May 6 |
| VHF-UHF FT8 Activity Contest-NA | 0000Z-0500Z, May 7 |
| Walk for the Bacon QRP Contest | 0000Z-0100Z, May 7 and 0200Z-0300Z, May 8 |
| NRAU 10m Activity Contest | 1700Z-1800Z, May 7 (CW) and 1800Z-1900Z, May 7 (SSB) and 1900Z-2000Z, May 7 (FM) and 2000Z-2100Z, May 7 (Dig) |
| SKCC Sprint Europe | 2000Z-2200Z, May 7 |
| Flemish Windmill Contest | 0600Z-1000Z, May 9 |
| VOLTA WW RTTY Contest | 1200Z, May 9 to 1200Z, May 10 |
| CQ-M International DX Contest | 1200Z, May 9 to 1159Z, May 10 |
| SKCC Weekend Sprintathon | 1200Z, May 9 to 2400Z, May 10 |
| Canadian Prairies QSO Party | 1700Z, May 9 to 0300Z, May 10 |
| 50 MHz Spring Sprint | 2300Z, May 9 to 0300Z, May 10 |
| May 11 - 17 | |
| 4 States QRP Group Second Sunday Sprint | 0000Z-0200Z, May 11 |
| RSGB 80m Club Championship, SSB | 1900Z-2030Z, May 11 |
| DARC FT4 Contest | 1900Z-2029Z, May 12 |
| VHF-UHF FT8 Activity Contest | 1700Z-2100Z, May 13 |
| VHF-UHF FT8 Activity Contest-NA | 0000Z-0500Z, May 14 |
| QRP Minimal Art Session | 1400Z-2200Z, May 14 |
| UN DX Contest | 0600Z-2100Z, May 16 |
| NZART Sangster Shield Contest | 0800Z-1100Z, May 16 |
| His Maj. King of Spain Contest, CW | 1200Z, May 16 to 1200Z, May 17 |
| EU PSK DX Contest | 1200Z, May 16 to 1200Z, May 17 |
| Arkansas QSO Party | 1400Z, May 16 to 0200Z, May 17 |
| Feld Hell Sprint | 2000Z-2359Z, May 16 |
| Baltic Contest | 2100Z, May 16 to 0200Z, May 17 |
| Run for the Bacon QRP Contest | 2300Z, May 17 to 0100Z, May 18 |
| May 18 - 24 | |
| RSGB FT4 Contest | 1900Z-2100Z, May 18 |
| VHF-UHF FT8 Activity Contest | 1700Z-2100Z, May 20 |
| RSGB 80m Club Championship, Data | 1900Z-2030Z, May 20 |
| VHF-UHF FT8 Activity Contest-NA | 0000Z-0500Z, May 21 |
| Walk for the Bacon QRP Contest | 0000Z-0100Z, May 21 and 0200Z-0300Z, May 22 |
| NAQCC CW Sprint | 0030Z-0230Z, May 21 |
| NTC QSO Party | 1900Z-2000Z, May 21 |
| Real Time Contest | 1600Z-2000Z, May 24 |
| May 25 - 31 | |
| QRP ARCI Hootowl Sprint | 0000Z-0100Z, May 25 |
| QCX Challenge | 1300Z-1400Z, May 25 |
| QCX Challenge | 1900Z-2000Z, May 25 |
| QCX Challenge | 0300Z-0400Z, May 26 |
| SKCC Sprint | 0000Z-0200Z, May 27 |
| RSGB 80m Club Championship, CW | 1900Z-2030Z, May 28 |
| CQ WW WPX Contest, CW | 0000Z, May 30 to 2359Z, May 31 |
| Romanian Diaspora SSB Contest | 0500Z-1700Z, May 31 |
| June 1 - 7 | |
| RSGB 80m Club Championship, Data | 1900Z-2030Z, Jun 1 |
| ARS Spartan Sprint | 0000Z-0200Z, Jun 2 |
| VHF-UHF FT8 Activity Contest | 1700Z-2100Z, Jun 3 |
| VHF-UHF FT8 Activity Contest-NA | 0000Z-0500Z, Jun 4 |
| Walk for the Bacon QRP Contest | 0000Z-0100Z, Jun 4 and 0200Z-0300Z, Jun 5 |
| NRAU 10m Activity Contest | 1700Z-1800Z, Jun 4 (CW) and 1800Z-1900Z, Jun 4 (SSB) and 1900Z-2000Z, Jun 4 (FM) and 2000Z-2100Z, Jun 4 (Dig) |
| SKCC Sprint Europe | 2000Z-2200Z, Jun 4 |
| HA3NS Sprint Memorial Contest | 1900Z-1929Z, Jun 5 (40m) and 1930Z-1959Z, Jun 5 (80m) |
| VK Shires Contest | 0000Z-2359Z, Jun 6 |
| PODXS 070 Club Three Day Weekend Contest | 0000Z, Jun 6 to 2359Z, Jun 8 |
| Tisza Cup CW Contest | 0000Z-1459Z, Jun 6 |
| Wake-Up! QRP Sprint | 0600Z-0629Z, Jun 6 and 0630Z-0659Z, Jun 6 and 0700Z-0729Z, Jun 6 and 0730Z-0800Z, Jun 6 |
| UKSMG Summer Contest | 1300Z, Jun 6 to 1300Z, Jun 7 |
| Kentucky QSO Party | 1300Z, June 6 to 0100Z, Jun 7 |
| IARU Region 1 Field Day, CW | 1500Z, Jun 6 to 1459Z, Jun 7 |
| RSGB National Field Day | 1500Z, Jun 6 to 1500Z, Jun 7 |
| ARRL Inter. Digital Contest | 1800Z, Jun 6 to 2400Z, Jun 7 |
| Atlantic Canada QSO Party | 1400Z, Jun 7 to 0100Z, Jun 8 |
5-Week Contest Calendar
