| January, 2021 | |
| AGB New Year Snowball Contest | 0000Z-0100Z, Jan 1 |
| NCCC RTTY Sprint | 0145Z-0215Z, Jan 1 |
| QRP Fox Hunt | 0200Z-0330Z, Jan 1 |
| NCCC Sprint | 0230Z-0300Z, Jan 1 |
| SARTG New Year RTTY Contest | 0800Z-1100Z, Jan 1 |
| AGCW Happy New Year Contest | 0900Z-1200Z, Jan 1 |
| AGCW VHF/UHF Contest | 1400Z-1700Z, Jan 1 (144) and 1700Z-1800Z, Jan 1 (432) |
| QRP ARCI New Years Sprint | 1500Z-1800Z, Jan 1 |
| PODXS 070 Club PSKFest | 0000Z-2400Z, Jan 2 |
| WW PMC Contest | 1200Z, Jan 2 to 1200Z, Jan 3 |
| RSGB AFS Contest, CW | 1300Z-1700Z, Jan 2 |
| Original QRP Contest | 1500Z, Jan 2 to 1500Z, Jan 3 |
| Winter VHF Sprint | 1600Z-1659Z, Jan 2 |
| ARRL Kids Day | 1800Z-2359Z, Jan 2 |
| ARRL RTTY Roundup | 1800Z, Jan 2 to 2400Z, Jan 3 |
| EUCW 160m Contest | 2000Z-2300Z, Jan 2 and 0400Z-0700Z, Jan 3 |
| K1USN Slow Speed Test | 0000Z-0100Z, Jan 4 |
| RSGB Hope QSO Party | 0930Z-1100Z, Jan 4 (RTTY) |
| OK1WC Memorial | 1630Z-1729Z, Jan 4 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Jan 5 |
| ARS Spartan Sprint | 0200Z-0400Z, Jan 5 |
| RSGB Hope QSO Party | 1100Z-1230Z, Jan 5 (SSB) |
| RTTYOPS Weeksprint | 1700Z-1900Z, Jan 5 |
| QRP Fox Hunt | 0200Z-0330Z, Jan 6 |
| Phone Weekly Test - Fray | 0230Z-0300Z, Jan 6 |
| RSGB Hope QSO Party | 1230Z-1400Z, Jan 6 (FT4) |
| CWops Mini-CWT Test | 1300Z-1400Z, Jan 6 |
| VHF-UHF FT8 Activity Contest | 1700Z-2000Z, Jan 6 |
| CWops Mini-CWT Test | 1900Z-2000Z, Jan 6 |
| UKEICC 80m Contest | 2000Z-2100Z, Jan 6 |
| AWA Linc Cundall Memorial CW Contest | 2300Z, Jan 6 to 2300Z, Jan 7 and 2300Z, Jan 9 to 2300Z, Jan 10 |
| CWops Mini-CWT Test | 0300Z-0400Z, Jan 7 |
| RSGB Hope QSO Party | 1400Z-1530Z, Jan 7 (CW) |
| RTTYOPS Weeksprint | 1700Z-1900Z, Jan 7 |
| NRAU 10m Activity Contest | 1800Z-1900Z, Jan 7 (CW) and 1900Z-2000Z, Jan 7 (SSB) and 2000Z-2100Z, Jan 7 (FM) and 2100Z-2200Z, Jan 7 (Dig) |
| SKCC Sprint Europe | 2000Z-2200Z, Jan 7 |
| NCCC RTTY Sprint | 0145Z-0215Z, Jan 8 |
| QRP Fox Hunt | 0200Z-0330Z, Jan 8 |
| NCCC Sprint Ladder | 0230Z-0300Z, Jan 8 |
| YB DX Contest | 0000Z-2359Z, Jan 9 |
| Old New Year Contest | 0500Z-0900Z, Jan 9 |
| SKCC Weekend Sprintathon | 1200Z, Jan 9 to 2400Z, Jan 10 |
| UBA PSK63 Prefix Contest | 1200Z, Jan 9 to 1200Z, Jan 10 |
| RTTYOPS Weekend Sprint | 1600Z-1959Z, Jan 9 |
| North American QSO Party, CW | 1800Z, Jan 9 to 0559Z, Jan 10 |
| NRAU-Baltic Contest, SSB | 0630Z-0830Z, Jan 10 |
| NRAU-Baltic Contest, CW | 0900Z-1100Z, Jan 10 |
| DARC 10-Meter Contest | 0900Z-1059Z, Jan 10 |
| RSGB AFS Contest, Data | 1300Z-1700Z, Jan 10 |
| K1USN Slow Speed Test | 0000Z-0100Z, Jan 11 |
| 4 States QRP Group Second Sunday Sprint | 0100Z-0300Z, Jan 11 |
| RSGB Hope QSO Party | 0930Z-1100Z, Jan 11 (FT4) |
| OK1WC Memorial | 1630Z-1729Z, Jan 11 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Jan 12 |
| RSGB Hope QSO Party | 1100Z-1230Z, Jan 12 (CW) |
| RTTYOPS Weeksprint | 1700Z-1900Z, Jan 12 |
| QRP Fox Hunt | 0200Z-0330Z, Jan 13 |
| Phone Weekly Test - Fray | 0230Z-0300Z, Jan 13 |
| RSGB Hope QSO Party | 1230Z-1400Z, Jan 13 (RTTY) |
| CWops Mini-CWT Test | 1300Z-1400Z, Jan 13 |
| VHF-UHF FT8 Activity Contest | 1700Z-2000Z, Jan 13 |
| CWops Mini-CWT Test | 1900Z-2000Z, Jan 13 |
| CWops Mini-CWT Test | 0300Z-0400Z, Jan 14 |
| RSGB Hope QSO Party | 1400Z-1530Z, Jan 14 (SSB) |
| RTTYOPS Weeksprint | 1700Z-1900Z, Jan 14 |
| NCCC RTTY Sprint | 0145Z-0215Z, Jan 15 |
| QRP Fox Hunt | 0200Z-0330Z, Jan 15 |
| NCCC Sprint Ladder | 0230Z-0300Z, Jan 15 |
| Hungarian DX Contest | 1200Z, Jan 16 to 1159Z, Jan 17 |
| PRO Digi Contest | 1200Z, Jan 16 to 1159Z, Jan 17 |
| RSGB AFS Contest, SSB | 1300Z-1700Z, Jan 16 |
| RTTYOPS Weekend Sprint | 1600Z-1959Z, Jan 16 |
| North American QSO Party, SSB | 1800Z, Jan 16 to 0559Z, Jan 17 |
| NA Collegiate Championship, SSB | 1800Z, Jan 16 to 0559Z, Jan 17 |
| ARRL January VHF Contest | 1900Z, Jan 16 to 0359Z, Jan 18 |
| WAB 1.8 MHz Phone | 1900Z-2300Z, Jan 16 |
| Feld Hell Sprint | 2000Z, Jan 16 to 0559Z, Jan 17 |
| Run for the Bacon QRP Contest | 2300Z, Jan 17 to 0100Z, Jan 18 |
| K1USN Slow Speed Test | 0000Z-0100Z, Jan 18 |
| OK1WC Memorial | 1630Z-1729Z, Jan 18 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Jan 19 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Jan 19 |
| QRP Fox Hunt | 0200Z-0330Z, Jan 20 |
| Phone Weekly Test - Fray | 0230Z-0300Z, Jan 20 |
| CWops Mini-CWT Test | 1300Z-1400Z, Jan 20 |
| CWops Mini-CWT Test | 1900Z-2000Z, Jan 20 |
| NAQCC CW Sprint | 0130Z-0330Z, Jan 21 |
| CWops Mini-CWT Test | 0300Z-0400Z, Jan 21 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Jan 21 |
| NCCC RTTY Sprint | 0145Z-0215Z, Jan 22 |
| QRP Fox Hunt | 0200Z-0330Z, Jan 22 |
| NCCC Sprint Ladder | 0230Z-0300Z, Jan 22 |
| BARTG RTTY Sprint | 1200Z, Jan 23 to 1200Z, Jan 24 |
| UK/EI DX Contest, CW | 1200Z, Jan 23 to 1200Z, Jan 24 |
| K1USN Slow Speed Test | 0000Z-0100Z, Jan 25 |
| QCX Challenge | 1300Z-1400Z, Jan 25 |
| OK1WC Memorial | 1630Z-1729Z, Jan 25 |
| QCX Challenge | 1900Z-2000Z, Jan 25 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Jan 26 |
| QCX Challenge | 0300Z-0400Z, Jan 26 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Jan 26 |
| SKCC Sprint | 0000Z-0200Z, Jan 27 |
| QRP Fox Hunt | 0200Z-0330Z, Jan 27 |
| Phone Weekly Test - Fray | 0230Z-0300Z, Jan 27 |
| CWops Mini-CWT Test | 1300Z-1400Z, Jan 27 |
| CWops Mini-CWT Test | 1900Z-2000Z, Jan 27 |
| UKEICC 80m Contest | 2000Z-2100Z, Jan 27 |
| NAQCC CW Sprint | 0130Z-0330Z, Jan 28 |
| CWops Mini-CWT Test | 0300Z-0400Z, Jan 28 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Jan 28 |
| NCCC RTTY Sprint | 0145Z-0215Z, Jan 29 |
| QRP Fox Hunt | 0200Z-0330Z, Jan 29 |
| NCCC Sprint Ladder | 0230Z-0300Z, Jan 29 |
| CQ 160-Meter Contest, CW | 2200Z, Jan 29 to 2200Z, Jan 31 |
| Feld Hell Sprint | 0000Z-2359Z, Jan 30 |
| REF Contest, CW | 0600Z, Jan 30 to 1800Z, Jan 31 |
| UBA DX Contest, SSB | 1300Z, Jan 30 to 1300Z, Jan 31 |
| RTTYOPS Weekend Sprint | 1600Z-1959Z, Jan 30 |
| Winter Field Day | 1900Z, Jan 30 to 1900Z, Jan 31 |
| February, 2021 | |
| K1USN Slow Speed Test | 0000Z-0100Z, Feb 1 |
| OK1WC Memorial | 1630Z-1729Z, Feb 1 |
| RSGB 80m Club Championship, SSB | 2000Z-2130Z, Feb 1 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Feb 2 |
| ARS Spartan Sprint | 0200Z-0400Z, Feb 2 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Feb 2 |
| QRP Fox Hunt | 0200Z-0330Z, Feb 3 |
| Phone Weekly Test - Fray | 0230Z-0300Z, Feb 3 |
| CWops Mini-CWT Test | 1300Z-1400Z, Feb 3 |
| VHF-UHF FT8 Activity Contest | 1700Z-2000Z, Feb 3 |
| CWops Mini-CWT Test | 1900Z-2000Z, Feb 3 |
| UKEICC 80m Contest | 2000Z-2100Z, Feb 3 |
| CWops Mini-CWT Test | 0300Z-0400Z, Feb 4 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Feb 4 |
| NRAU 10m Activity Contest | 1800Z-1900Z, Feb 4 (CW) and 1900Z-2000Z, Feb 4 (SSB) and 2000Z-2100Z, Feb 4 (FM) and 2100Z-2200Z, Feb 4 (Dig) |
| SKCC Sprint Europe | 2000Z-2200Z, Feb 4 |
| NCCC RTTY Sprint | 0145Z-0215Z, Feb 5 |
| QRP Fox Hunt | 0200Z-0330Z, Feb 5 |
| NCCC Sprint Ladder | 0230Z-0300Z, Feb 5 |
| K1USN Slow Speed Test | 2000Z-2100Z, Feb 5 |
| Vermont QSO Party | 0000Z, Feb 6 to 2400Z, Feb 7 |
| 10-10 Int. Winter Contest, SSB | 0001Z, Feb 6 to 2359Z, Feb 7 |
| EurAsia HF Championship | 0800Z-1700Z, Feb 6 |
| Mexico RTTY International Contest | 1200Z, Feb 6 to 2359Z, Feb 7 |
| F9AA Cup, CW | 1200Z, Feb 6 to 1200Z, Feb 7 |
| Minnesota QSO Party | 1400Z-2400Z, Feb 6 |
| FYBO Winter QRP Sprint | 1400Z-2400Z, Feb 6 |
| AGCW Straight Key Party | 1600Z-1900Z, Feb 6 |
| British Columbia QSO Party | 1600Z, Feb 6 to 0359Z, Feb 7 and 1600Z-2359Z, Feb 7 |
| FISTS Saturday Sprint | 1600Z-1800Z, Feb 6 |
| European Union DX Contest | 1800Z, Feb 6 to 1800Z, Feb 7 |
| North American Sprint, CW | 2300Z, Feb 6 to 0300Z, Feb 7 |
| K1USN Slow Speed Test | 0000Z-0100Z, Feb 8 |
| ARRL School Club Roundup | 1300Z, Feb 8 to 2359Z, Feb 12 |
| OK1WC Memorial | 1630Z-1729Z, Feb 8 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Feb 9 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Feb 9 |
| NAQCC CW Sprint | 0130Z-0330Z, Feb 10 |
| QRP Fox Hunt | 0200Z-0330Z, Feb 10 |
| Phone Weekly Test - Fray | 0230Z-0300Z, Feb 10 |
| CWops Mini-CWT Test | 1300Z-1400Z, Feb 10 |
| VHF-UHF FT8 Activity Contest | 1700Z-2000Z, Feb 10 |
| CWops Mini-CWT Test | 1900Z-2000Z, Feb 10 |
| RSGB 80m Club Championship, Data | 2000Z-2130Z, Feb 10 |
| CWops Mini-CWT Test | 0300Z-0400Z, Feb 11 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Feb 11 |
| NCCC RTTY Sprint | 0145Z-0215Z, Feb 12 |
| QRP Fox Hunt | 0200Z-0330Z, Feb 12 |
| NCCC Sprint | 0230Z-0300Z, Feb 12 |
| K1USN Slow Speed Test | 2000Z-2100Z, Feb 12 |
| CQ WW RTTY WPX Contest | 0000Z, Feb 13 to 2359Z, Feb 14 |
| Asia-Pacific Spring Sprint, CW | 1100Z-1300Z, Feb 13 |
| SKCC Weekend Sprintathon | 1200Z, Feb 13 to 2400Z, Feb 14 |
| KCJ Topband Contest | 1200Z, Feb 13 to 2359Z, Feb 14 |
| Dutch PACC Contest | 1200Z, Feb 13 to 1200Z, Feb 14 |
| YLRL YL-OM Contest | 1400Z, Feb 13 to 0200Z, Feb 15 |
| OMISS QSO Party | 1500Z, Feb 13 to 1500Z, Feb 14 |
| HamCation QSO Party | 1500Z, Feb 13 to 0300Z, Feb 14 |
| RSGB 1.8 MHz Contest | 1900Z-2300Z, Feb 13 |
| AWA Amplitude Modulation QSO Party | 2300Z, Feb 13 to 2300Z, Feb 14 |
| PODXS 070 Club Valentine Sprint | 0000Z-2359Z, Feb 14 |
| Balkan HF Contest | 1300Z-1700Z, Feb 14 |
| K1USN Slow Speed Test | 0000Z-0100Z, Feb 15 |
| CQC Winter QSO Party | 0100Z-0259Z, Feb 15 |
| 4 States QRP Group Second Sunday Sprint | 0100Z-0300Z, Feb 15 |
| OK1WC Memorial | 1630Z-1729Z, Feb 15 |
| RSGB FT4 Contest Series | 2000Z-2130Z, Feb 15 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Feb 16 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Feb 16 |
| QRP Fox Hunt | 0200Z-0330Z, Feb 17 |
| Phone Weekly Test - Fray | 0230Z-0300Z, Feb 17 |
| CWops Mini-CWT Test | 1300Z-1400Z, Feb 17 |
| AGCW Semi-Automatic Key Evening | 1900Z-2030Z, Feb 17 |
| CWops Mini-CWT Test | 1900Z-2000Z, Feb 17 |
| CWops Mini-CWT Test | 0300Z-0400Z, Feb 18 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Feb 18 |
| NCCC RTTY Sprint | 0145Z-0215Z, Feb 19 |
| QRP Fox Hunt | 0200Z-0330Z, Feb 19 |
| NCCC Sprint | 0230Z-0300Z, Feb 19 |
| K1USN Slow Speed Test | 2000Z-2100Z, Feb 19 |
| ARRL Inter. DX Contest, CW | 0000Z, Feb 20 to 2400Z, Feb 21 |
| Russian PSK WW Contest | 1200Z, Feb 20 to 1159Z, Feb 21 |
| RTTYOPS Weekend Sprint | 1600Z-1959Z, Feb 20 |
| Feld Hell Sprint | 1900Z-2059Z, Feb 20 |
| FISTS Sunday Sprint | 2100Z-2300Z, Feb 21 |
| Run for the Bacon QRP Contest | 2300Z, Feb 21 to 0100Z, Feb 22 |
| K1USN Slow Speed Test | 0000Z-0100Z, Feb 22 |
| QCX Challenge | 1300Z-1400Z, Feb 22 |
| OK1WC Memorial | 1630Z-1729Z, Feb 22 |
| QCX Challenge | 1900Z-2000Z, Feb 22 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Feb 23 |
| QCX Challenge | 0300Z-0400Z, Feb 23 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Feb 23 |
| SKCC Sprint | 0000Z-0200Z, Feb 24 |
| QRP Fox Hunt | 0200Z-0330Z, Feb 24 |
| Phone Weekly Test - Fray | 0230Z-0300Z, Feb 24 |
| CWops Mini-CWT Test | 1300Z-1400Z, Feb 24 |
| CWops Mini-CWT Test | 1900Z-2000Z, Feb 24 |
| UKEICC 80m Contest | 2000Z-2100Z, Feb 24 |
| CWops Mini-CWT Test | 0300Z-0400Z, Feb 25 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Feb 25 |
| RSGB 80m Club Championship, CW | 2000Z-2130Z, Feb 25 |
| NCCC RTTY Sprint | 0145Z-0215Z, Feb 26 |
| QRP Fox Hunt | 0200Z-0330Z, Feb 26 |
| NCCC Sprint | 0230Z-0300Z, Feb 26 |
| K1USN Slow Speed Test | 2000Z-2100Z, Feb 26 |
| CQ 160-Meter Contest, SSB | 2200Z, Feb 26 to 2200Z, Feb 28 |
| REF Contest, SSB | 0600Z, Feb 27 to 1800Z, Feb 28 |
| FTn DX Contest | 1200Z, Feb 27 to 1200Z, Feb 28 |
| UBA DX Contest, CW | 1300Z, Feb 27 to 1300Z, Feb 28 |
| South Carolina QSO Party | 1500Z, Feb 27 to 0159Z, Feb 28 |
| North American QSO Party, RTTY | 1800Z, Feb 27 to 0559Z, Feb 28 |
| NA Collegiate Championship, RTTY | 1800Z, Feb 27 to 0559Z, Feb 28 |
| Classic Exchange, CW | 1400Z, Feb 28 to 0800Z, Mar 1 and 1400Z, Mar 2 to 0800Z, Mar 3 |
| High Speed Club CW Contest | 1400Z-1700Z, Feb 28 |
| North Carolina QSO Party | 1500Z, Feb 28 to 0059Z, Mar 1 |
| March, 2021 | |
| K1USN Slow Speed Test | 0000Z-0100Z, Mar 1 |
| OK1WC Memorial | 1630Z-1729Z, Mar 1 |
| RSGB 80m Club Championship, Data | 2000Z-2130Z, Mar 1 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Mar 2 |
| ARS Spartan Sprint | 0200Z-0400Z, Mar 2 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Mar 2 |
| AGCW YL-CW Party | 1900Z-2100Z, Mar 2 |
| QRP Fox Hunt | 0200Z-0330Z, Mar 3 |
| Phone Weekly Test - Fray | 0230Z-0300Z, Mar 3 |
| CWops Mini-CWT Test | 1300Z-1400Z, Mar 3 |
| VHF-UHF FT8 Activity Contest | 1700Z-2000Z, Mar 3 |
| CWops Mini-CWT Test | 1900Z-2000Z, Mar 3 |
| UKEICC 80m Contest | 2000Z-2100Z, Mar 3 |
| CWops Mini-CWT Test | 0300Z-0400Z, Mar 4 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Mar 4 |
| NRAU 10m Activity Contest | 1800Z-1900Z, Mar 4 (CW) and 1900Z-2000Z, Mar 4 (SSB) and 2000Z-2100Z, Mar 4 (FM) and 2100Z-2200Z, Mar 4 (Dig) |
| SKCC Sprint Europe | 2000Z-2200Z, Mar 4 |
| NCCC RTTY Sprint | 0145Z-0215Z, Mar 5 |
| QRP Fox Hunt | 0200Z-0330Z, Mar 5 |
| NCCC Sprint | 0230Z-0300Z, Mar 5 |
| K1USN Slow Speed Test | 2000Z-2100Z, Mar 5 |
| ARRL Inter. DX Contest, SSB | 0000Z, Mar 6 to 2400Z, Mar 7 |
| Novice Rig Roundup | 0000Z, Mar 6 to 2359Z, Mar 14 |
| Wake-Up! QRP Sprint | 0600Z-0629Z, Mar 6 and 0630Z-0659Z, Mar 6 and 0700Z-0729Z, Mar 6 and 0730Z-0800Z, Mar 6 |
| Open Ukraine RTTY Championship | 1800Z-2059Z, Mar 6 (Low Band) and 2100Z-2359Z, Mar 6 (Low Band) and 0800Z-1059Z, Mar 7 (High Band) and 1100Z-1359Z, Mar 7 (High Band) |
| UBA Spring Contest, CW | 0700Z-1100Z, Mar 7 |
| NSARA Contest | 1200Z-1600Z, Mar 7 and 1800Z-2200Z, Mar 7 |
| SARL Hamnet 40m Simulated Emerg Contest | 1200Z-1400Z, Mar 7 |
| WAB 3.5 MHz Phone | 1800Z-2200Z, Mar 7 |
| K1USN Slow Speed Test | 0000Z-0100Z, Mar 8 |
| OK1WC Memorial | 1630Z-1729Z, Mar 8 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Mar 9 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Mar 9 |
| QRP Fox Hunt | 0200Z-0330Z, Mar 10 |
| Phone Weekly Test - Fray | 0230Z-0300Z, Mar 10 |
| CWops Mini-CWT Test | 1300Z-1400Z, Mar 10 |
| VHF-UHF FT8 Activity Contest | 1700Z-2000Z, Mar 10 |
| CWops Mini-CWT Test | 1900Z-2000Z, Mar 10 |
| RSGB 80m Club Championship, CW | 2000Z-2130Z, Mar 10 |
| AWA John Rollins Memorial DX Contest | 2300Z, Mar 10 to 2300Z, Mar 11 and 2300Z, Mar 13 to 2300Z, Mar 14 |
| CWops Mini-CWT Test | 0300Z-0400Z, Mar 11 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Mar 11 |
| NCCC RTTY Sprint | 0145Z-0215Z, Mar 12 |
| QRP Fox Hunt | 0200Z-0330Z, Mar 12 |
| NCCC Sprint | 0230Z-0300Z, Mar 12 |
| K1USN Slow Speed Test | 2000Z-2100Z, Mar 12 |
| YB DX RTTY Contest | 0000Z-2359Z, Mar 13 |
| SARL VHF/UHF Analogue Contest | 0500Z-0700Z, Mar 13 (6m) and 0700Z-0900Z, Mar 13 (2m) and 0900Z-1100Z, Mar 13 (70cm) and 0500Z-0700Z, Mar 14 (6m) and 0700Z-0900Z, Mar 14 (2m) and 0900Z-1100Z, Mar 14 (70cm) |
| SARL Field Day Contest | 0800Z, Mar 13 to 0800Z, Mar 14 |
| RSGB Commonwealth | 1000Z, Mar 13 to 1000Z, Mar 14 |
| SKCC Weekend Sprintathon | 1200Z, Mar 13 to 2400Z, Mar 14 |
| F9AA Cup, SSB | 1200Z, Mar 13 to 1200Z, Mar 14 |
| South America 10 Meter Contest | 1200Z, Mar 13 to 1200Z, Mar 14 |
| DIG QSO Party, SSB | 1200Z-1700Z, Mar 13 (20m-10m) and 0700Z-0900Z, Mar 14 (80m) and 0900Z-1100Z, Mar 14 (40m) |
| AGCW QRP Contest | 1400Z-2000Z, Mar 13 |
| Stew Perry Topband Challenge | 1500Z, Mar 13 to 1500Z, Mar 14 |
| Oklahoma QSO Party | 1500Z, Mar 13 to 0200Z, Mar 14 and 1500Z-2100Z, Mar 14 |
| EA PSK63 Contest | 1600Z, Mar 13 to 1600Z, Mar 14 |
| QCWA QSO Party | 1800Z, Mar 13 to 1800Z, Mar 14 |
| TESLA Memorial HF CW Contest | 1800Z, Mar 13 to 0559Z, Mar 14 |
| Idaho QSO Party | 1900Z, Mar 13 to 1900Z, Mar 14 |
| North American Sprint, RTTY | 2300Z, Mar 13 to 0300Z, Mar 14 |
| UBA Spring Contest, 2m | 0700Z-1100Z, Mar 14 |
| FIRAC HF Contest | 0700Z to 1700Z, Mar 14 |
| Classic Exchange, Phone | 1400Z, Mar 14 to 0800Z, Mar 15 and 1400Z, Mar 16 to 0800Z, Mar 17 |
| Wisconsin QSO Party | 1800Z, Mar 14 to 0100Z, Mar 15 |
| 4 States QRP Group Second Sunday Sprint | 0000Z-0200Z, Mar 15 |
| K1USN Slow Speed Test | 0000Z-0100Z, Mar 15 |
| OK1WC Memorial | 1630Z-1729Z, Mar 15 |
| Bucharest Digital Contest | 1800Z-2059Z, Mar 15 |
| RSGB FT4 Contest Series | 2000Z-2130Z, Mar 15 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Mar 16 |
| CLARA Chatter Party | 1700Z, Mar 16 to 1700Z, Mar 17 and 1700Z, Mar 20 to 1700Z, Mar 21 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Mar 16 |
| QRP Fox Hunt | 0100Z-0230Z, Mar 17 |
| Phone Weekly Test - Fray | 0230Z-0300Z, Mar 17 |
| CWops Mini-CWT Test | 1300Z-1400Z, Mar 17 |
| CWops Mini-CWT Test | 1900Z-2000Z, Mar 17 |
| NAQCC CW Sprint | 0030Z-0230Z, Mar 18 |
| CWops Mini-CWT Test | 0300Z-0400Z, Mar 18 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Mar 18 |
| BCC QSO Party | 1930Z-2059Z, Mar 18 |
| QRP Fox Hunt | 0100Z-0230Z, Mar 19 |
| NCCC RTTY Sprint | 0145Z-0215Z, Mar 19 |
| NCCC Sprint | 0230Z-0300Z, Mar 19 |
| K1USN Slow Speed Test | 2000Z-2100Z, Mar 19 |
| BARTG HF RTTY Contest | 0200Z, Mar 20 to 0159Z, Mar 22 |
| Russian DX Contest | 1200Z, Mar 20 to 1200Z, Mar 21 |
| AGCW VHF/UHF Contest | 1400Z-1700Z, Mar 20 (144) and 1700Z-1800Z, Mar 20 (432) |
| Virginia QSO Party | 1400Z, Mar 20 to 0400Z, Mar 21 and 1200Z-2400Z, Mar 21 |
| Feld Hell Sprint | 2000Z-2159Z, Mar 20 |
| UBA Spring Contest, SSB | 0700Z-1100Z, Mar 21 |
| Run for the Bacon QRP Contest | 2300Z, Mar 21 to 0100Z, Mar 22 |
| K1USN Slow Speed Test | 0000Z-0100Z, Mar 22 |
| OK1WC Memorial | 1630Z-1729Z, Mar 22 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Mar 23 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Mar 23 |
| SKCC Sprint | 0000Z-0200Z, Mar 24 |
| QRP Fox Hunt | 0100Z-0230Z, Mar 24 |
| Phone Weekly Test - Fray | 0230Z-0300Z, Mar 24 |
| CWops Mini-CWT Test | 1300Z-1400Z, Mar 24 |
| CWops Mini-CWT Test | 1900Z-2000Z, Mar 24 |
| CWops Mini-CWT Test | 0300Z-0400Z, Mar 25 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Mar 25 |
| RSGB 80m Club Championship, SSB | 2000Z-2130Z, Mar 25 |
| QRP Fox Hunt | 0100Z-0230Z, Mar 26 |
| NCCC RTTY Sprint | 0145Z-0215Z, Mar 26 |
| NCCC Sprint | 0230Z-0300Z, Mar 26 |
| K1USN Slow Speed Test | 2000Z-2100Z, Mar 26 |
| CQ WW WPX Contest, SSB | 0000Z, Mar 27 to 2359Z, Mar 28 |
| FOC QSO Party | 0000Z-2359Z, Mar 27 |
| UBA Spring Contest, 6m | 0600Z-1000Z, Mar 28 |
| K1USN Slow Speed Test | 0000Z-0100Z, Mar 29 |
| QCX Challenge | 1300Z-1400Z, Mar 29 |
| OK1WC Memorial | 1630Z-1729Z, Mar 29 |
| QCX Challenge | 1900Z-2000Z, Mar 29 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Mar 30 |
| QCX Challenge | 0300Z-0400Z, Mar 30 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Mar 30 |
| QRP Fox Hunt | 0100Z-0230Z, Mar 31 |
| Phone Weekly Test - Fray | 0230Z-0300Z, Mar 31 |
| CWops Mini-CWT Test | 1300Z-1400Z, Mar 31 |
| CWops Mini-CWT Test | 1900Z-2000Z, Mar 31 |
| UKEICC 80m Contest | 2000Z-2100Z, Mar 31 |
| April, 2021 | |
| CWops Mini-CWT Test | 0300Z-0400Z, Apr 1 |
| SARL 80m QSO Party | 1700Z-2000Z, Apr 1 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Apr 1 |
| NRAU 10m Activity Contest | 1800Z-1900Z, Apr 1 (CW) and 1900Z-2000Z, Apr 1 (SSB) and 2000Z-2100Z, Apr 1 (FM) and 2100Z-2200Z, Apr 1 (Dig) |
| SKCC Sprint Europe | 1900Z-2100Z, Apr 1 |
| QRP Fox Hunt | 0100Z-0230Z, Apr 2 |
| NCCC RTTY Sprint | 0145Z-0215Z, Apr 2 |
| NCCC Sprint | 0230Z-0300Z, Apr 2 |
| K1USN Slow Speed Test | 2000Z-2100Z, Apr 2 |
| PODXS 070 Club PSK 31 Flavors Contest | 1000Z, Apr 3 to 0400Z, Apr 4 |
| Louisiana QSO Party | 1400Z, Apr 3 to 0200Z, Apr 4 |
| Mississippi QSO Party | 1400Z, Apr 3 to 0200Z, Apr 4 |
| Florida State Parks on the Air | 1400Z-2200Z, Apr 3 and 1400Z-2200Z, Apr 4 |
| SP DX Contest | 1500Z, Apr 3 to 1500Z, Apr 4 |
| EA RTTY Contest | 1600Z, Apr 3 to 1600Z, Apr 4 |
| North American SSB Sprint Contest | 0000Z-0400Z, Apr 4 |
| K1USN Slow Speed Test | 0000Z-0100Z, Apr 5 |
| DARC Easter Contest | 1500Z-1730Z, Apr 5 |
| OK1WC Memorial | 1630Z-1729Z, Apr 5 |
| 144 MHz Spring Sprint | 1900 local - 2300 local, Apr 5 |
| ARS Spartan Sprint | 0100Z-0300Z, Apr 6 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Apr 6 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Apr 6 |
| Phone Weekly Test - Fray | 0230Z-0300Z, Apr 7 |
| CWops Mini-CWT Test | 1300Z-1400Z, Apr 7 |
| VHF-UHF FT8 Activity Contest | 1700Z-2000Z, Apr 7 |
| CWops Mini-CWT Test | 1900Z-2000Z, Apr 7 |
| RSGB FT4 Contest Series | 1900Z-2030Z, Apr 7 |
| UKEICC 80m Contest | 2000Z-2100Z, Apr 7 |
| CWops Mini-CWT Test | 0300Z-0400Z, Apr 8 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Apr 8 |
| NCCC RTTY Sprint | 0145Z-0215Z, Apr 9 |
| NCCC Sprint | 0230Z-0300Z, Apr 9 |
| K1USN Slow Speed Test | 2000Z-2100Z, Apr 9 |
| QRP ARCI Spring QSO Party | 0000Z-0600Z, Apr 10 |
| JIDX CW Contest | 0700Z, Apr 10 to 1300Z, Apr 11 |
| SKCC Weekend Sprintathon | 1200Z, Apr 10 to 2400Z, Apr 11 |
| OK/OM DX Contest, SSB | 1200Z, Apr 10 to 1200Z, Apr 11 |
| FTn DX Contest | 1200Z, Apr 10 to 1200Z, Apr 11 |
| IG-RY World Wide RTTY Contest | 1200Z, Apr 10 to 1800Z, Apr 11 |
| DIG QSO Party, CW | 1200Z-1700Z, Apr 10 (20m-10m) and 0700Z-0900Z, Apr 11 (80m) and 0900Z-1100Z, Apr 11 (40m) |
| Nebraska QSO Party | 1300Z, Apr 10 to 0100Z, Apr 11 and 1300Z-2200Z, Apr 11 |
| New Mexico QSO Party | 1400Z, Apr 10 to 0200Z, Apr 11 |
| Georgia QSO Party | 1800Z, Apr 10 to 0359Z, Apr 11 and 1400Z-2359Z, Apr 11 |
| North Dakota QSO Party | 1800Z, Apr 10 to 1800Z, Apr 11 |
| Yuri Gagarin International DX Contest | 2100Z, Apr 10 to 2100Z, Apr 11 |
| International Vintage Contest HF | 0700Z-1100Z, Apr 11 and 1400Z-1800Z, Apr 11 |
| WAB 3.5/7/14 MHz Data Modes | 1000Z-1400Z, Apr 11 and 1700Z-2100Z, Apr 11 |
| Hungarian Straight Key Contest | 1500Z-1600Z, Apr 11 |
| RSGB RoLo SSB | 1900Z-2030Z, Apr 11 |
| 4 States QRP Group Second Sunday Sprint | 0000Z-0200Z, Apr 12 |
| K1USN Slow Speed Test | 0000Z-0100Z, Apr 12 |
| OK1WC Memorial | 1630Z-1729Z, Apr 12 |
| RSGB 80m Club Championship, CW | 1900Z-2030Z, Apr 12 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Apr 13 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Apr 13 |
| 222 MHz Spring Sprint | 1900 local - 2300 local, Apr 13 |
| NAQCC CW Sprint | 0030Z-0230Z, Apr 14 |
| Phone Weekly Test - Fray | 0230Z-0300Z, Apr 14 |
| CWops Mini-CWT Test | 1300Z-1400Z, Apr 14 |
| VHF-UHF FT8 Activity Contest | 1700Z-2000Z, Apr 14 |
| CWops Mini-CWT Test | 1900Z-2000Z, Apr 14 |
| CWops Mini-CWT Test | 0300Z-0400Z, Apr 15 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Apr 15 |
| NCCC RTTY Sprint | 0145Z-0215Z, Apr 16 |
| NCCC Sprint | 0230Z-0300Z, Apr 16 |
| K1USN Slow Speed Test | 2000Z-2100Z, Apr 16 |
| Holyland DX Contest | 2100Z, Apr 16 to 2100Z, Apr 17 |
| ES Open HF Championship | 0500Z-0559Z, Apr 17 and 0600Z-0659Z, Apr 17 and 0700Z-0759Z, Apr 17 and 0800Z-0859Z, Apr 17 |
| Worked All Provinces of China DX Contest | 0600Z, Apr 17 to 0559Z, Apr 18 |
| YU DX Contest | 0700Z, Apr 17 to 0659Z, Apr 18 |
| CQMM DX Contest | 0900Z, Apr 17 to 2359Z, Apr 18 |
| VERON PACCdigi Contest | 1200Z to 2359Z, Apr 17 |
| Texas State Parks on the Air | 1400Z, Apr 17 to 0200Z, Apr 18 and 1400Z-2000Z, Apr 18 |
| Michigan QSO Party | 1600Z, Apr 17 to 0400Z, Apr 18 |
| EA-QRP CW Contest | 1700Z-1800Z, Apr 17 (10m) and 1800Z-1900Z, Apr 17 (15m) and 1900Z-2000Z, Apr 17 (20m) and 2000Z-2100Z, Apr 17 (40m) and 2100Z-2300Z, Apr 17 (80m) and 0700Z-0900Z, Apr 18 (40m) and 0900Z-1000Z, Apr 18 (20m) and 1000Z-1100Z, Apr 18 (15m) and 1100Z-1200Z, Apr 18 (10m) |
| Feld Hell Sprint | 1800Z-2159Z, Apr 17 |
| Ontario QSO Party | 1800Z, Apr 17 to 0500Z, Apr 18 and 1200Z-1800Z, Apr 18 |
| ARRL Rookie Roundup, SSB | 1800Z-2359Z, Apr 18 |
| Run for the Bacon QRP Contest | 2300Z, Apr 18 to 0100Z, Apr 19 |
| K1USN Slow Speed Test | 0000Z-0100Z, Apr 19 |
| OK1WC Memorial | 1630Z-1729Z, Apr 19 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Apr 20 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Apr 20 |
| Phone Weekly Test - Fray | 0230Z-0300Z, Apr 21 |
| CWops Mini-CWT Test | 1300Z-1400Z, Apr 21 |
| RSGB 80m Club Championship, SSB | 1900Z-2030Z, Apr 21 |
| 432 MHz Spring Sprint | 1900 local - 2300 local, Apr 21 |
| CWops Mini-CWT Test | 1900Z-2000Z, Apr 21 |
| CWops Mini-CWT Test | 0300Z-0400Z, Apr 22 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Apr 22 |
| EACW Meeting | 1900Z-2000Z, Apr 22 |
| NCCC RTTY Sprint | 0145Z-0215Z, Apr 23 |
| NCCC Sprint | 0230Z-0300Z, Apr 23 |
| K1USN Slow Speed Test | 2000Z-2100Z, Apr 23 |
| 10-10 Int. Spring Contest, Digital | 0001Z, Apr 24 to 2359Z, Apr 25 |
| QRP to the Field | 0800-1800 local, Apr 24 |
| SP DX RTTY Contest | 1200Z, Apr 24 to 1200Z, Apr 25 |
| Helvetia Contest | 1300Z, Apr 24 to 1259Z, Apr 25 |
| VHF SSB/CW 2m Sprint Classic | 1300Z-2200Z, Apr 24 |
| Florida QSO Party | 1600Z, Apr 24 to 0159Z, Apr 25 and 1200Z-2159Z, Apr 25 |
| UA1DZ Memorial Cup | 1300Z-1859Z, Apr 25 |
| BARTG Sprint 75 | 1700Z-2059Z, Apr 25 |
| K1USN Slow Speed Test | 0000Z-0100Z, Apr 26 |
| QCX Challenge | 1300Z-1400Z, Apr 26 |
| OK1WC Memorial | 1630Z-1729Z, Apr 26 |
| QCX Challenge | 1900Z-2000Z, Apr 26 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, Apr 27 |
| QCX Challenge | 0300Z-0400Z, Apr 27 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Apr 27 |
| SKCC Sprint | 0000Z-0200Z, Apr 28 |
| Phone Weekly Test - Fray | 0230Z-0300Z, Apr 28 |
| CWops Mini-CWT Test | 1300Z-1400Z, Apr 28 |
| CWops Mini-CWT Test | 1900Z-2000Z, Apr 28 |
| UKEICC 80m Contest | 2000Z-2100Z, Apr 28 |
| CWops Mini-CWT Test | 0300Z-0400Z, Apr 29 |
| RTTYOPS Weeksprint | 1700Z-1900Z, Apr 29 |
| RSGB 80m Club Championship, Data | 1900Z-2030Z, Apr 29 |
| EACW Meeting | 1900Z-2000Z, Apr 29 |
| NCCC RTTY Sprint | 0145Z-0215Z, Apr 30 |
| NCCC Sprint | 0230Z-0300Z, Apr 30 |
| K1USN Slow Speed Test | 2000Z-2100Z, Apr 30 |
| May, 2021 | |
| Araucaria World Wide VHF Contest | 0000Z, May 1 to 1600Z, May 2 |
| 10-10 Int. Spring Contest, CW | 0001Z, May 1 to 2359Z, May 2 |
| RCC Cup | 0300Z-0859Z, May 1 |
| SBMS 2.3 GHz and Up Contest and Club Challenge | 0600 local, May 1 to 2359 local, May 2 |
| Microwave Spring Sprint | 0800-1400 local, May 1 |
| ARI International DX Contest | 1200Z, May 1 to 1159Z, May 2 |
| F9AA Cup, Digi | 1200Z, May 1 to 1200Z, May 2 |
| AGCW QRP/QRP Party | 1300Z-1900Z, May 1 |
| 7th Call Area QSO Party | 1300Z, May 1 to 0700Z, May 2 |
| Indiana QSO Party | 1500Z, May 1 to 0300Z, May 2 |
| FISTS Saturday Sprint | 1600Z-1800Z, May 1 |
| Delaware QSO Party | 1700Z, May 1 to 2359Z, May 2 |
| New England QSO Party | 2000Z, May 1 to 0500Z, May 2 and 1300Z-2400Z, May 2 |
| K1USN Slow Speed Test | 0000Z-0100Z, May 3 |
| OK1WC Memorial | 1630Z-1729Z, May 3 |
| ARS Spartan Sprint | 0100Z-0300Z, May 4 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, May 4 |
| RTTYOPS Weeksprint | 1700Z-1900Z, May 4 |
| MIE 33 Contest | 2300Z, May 4 to 0300Z, May 5 |
| Phone Weekly Test - Fray | 0230Z-0300Z, May 5 |
| CWops Mini-CWT Test | 1300Z-1400Z, May 5 |
| VHF-UHF FT8 Activity Contest | 1700Z-2000Z, May 5 |
| CWops Mini-CWT Test | 1900Z-2000Z, May 5 |
| RSGB FT4 Contest Series | 1900Z-2030Z, May 5 |
| Walk for the Bacon QRP Contest | 0000Z-0100Z, May 6 and 0200Z-0300Z, May 7 |
| CWops Mini-CWT Test | 0300Z-0400Z, May 6 |
| NRAU 10m Activity Contest | 1700Z-1800Z, May 6 (CW) and 1800Z-1900Z, May 6 (SSB) and 1900Z-2000Z, May 6 (FM) and 2000Z-2100Z, May 6 (Dig) |
| RTTYOPS Weeksprint | 1700Z-1900Z, May 6 |
| SKCC Sprint Europe | 1900Z-2100Z, May 6 |
| EACW Meeting | 1900Z-2000Z, May 6 |
| NCCC RTTY Sprint | 0145Z-0215Z, May 7 |
| NCCC Sprint | 0230Z-0300Z, May 7 |
| K1USN Slow Speed Test | 2000Z-2100Z, May 7 |
| SARL VHF/UHF Digital Contest | 0500Z-0700Z, May 8 (6m) and 0700Z-0900Z, May 8 (2m) and 0900Z-1100Z, May 8 (70cm) and 0500Z-0700Z, May 9 (6m) and 0700Z-0900Z, May 9 (2m) and 0900Z-1100Z, May 9 (70cm) |
| VOLTA WW RTTY Contest | 1200Z, May 8 to 1200Z, May 9 |
| CQ-M International DX Contest | 1200Z, May 8 to 1159Z, May 9 |
| SKCC Weekend Sprintathon | 1200Z, May 8 to 2400Z, May 9 |
| Arkansas QSO Party | 1400Z, May 8 to 0200Z, May 9 |
| 50 MHz Spring Sprint | 2300Z, May 8 to 0300Z, May 9 |
| WAB 7 MHz Phone | 1000Z-1400Z, May 9 |
| 4 States QRP Group Second Sunday Sprint | 0000Z-0200Z, May 10 |
| K1USN Slow Speed Test | 0000Z-0100Z, May 10 |
| OK1WC Memorial | 1630Z-1729Z, May 10 |
| RSGB 80m Club Championship, SSB | 1900Z-2030Z, May 10 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, May 11 |
| RTTYOPS Weeksprint | 1700Z-1900Z, May 11 |
| Phone Weekly Test - Fray | 0230Z-0300Z, May 12 |
| CWops Mini-CWT Test | 1300Z-1400Z, May 12 |
| VHF-UHF FT8 Activity Contest | 1700Z-2000Z, May 12 |
| CWops Mini-CWT Test | 1900Z-2000Z, May 12 |
| CWops Mini-CWT Test | 0300Z-0400Z, May 13 |
| QRP Minimal Art Session | 1400Z-2200Z, May 13 |
| RTTYOPS Weeksprint | 1700Z-1900Z, May 13 |
| EACW Meeting | 1900Z-2000Z, May 13 |
| NCCC RTTY Sprint | 0145Z-0215Z, May 14 |
| NCCC Sprint | 0230Z-0300Z, May 14 |
| K1USN Slow Speed Test | 2000Z-2100Z, May 14 |
| UN DX Contest | 0600Z-2100Z, May 15 |
| NZART Sangster Shield Contest | 0800Z-1100Z, May 15 and 0800Z-1100Z, May 16 |
| His Maj. King of Spain Contest, CW | 1200Z, May 15 to 1200Z, May 16 |
| Feld Hell Sprint | 1600Z-1759Z, May 15 and 2000Z-2159Z, May 15 |
| FISTS Sunday Sprint | 2100Z-2300Z, May 16 |
| Run for the Bacon QRP Contest | 2300Z, May 16 to 0100Z, May 17 |
| K1USN Slow Speed Test | 0000Z-0100Z, May 17 |
| OK1WC Memorial | 1630Z-1729Z, May 17 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, May 18 |
| RTTYOPS Weeksprint | 1700Z-1900Z, May 18 |
| Phone Weekly Test - Fray | 0230Z-0300Z, May 19 |
| CWops Mini-CWT Test | 1300Z-1400Z, May 19 |
| RSGB 80m Club Championship, Data | 1900Z-2030Z, May 19 |
| CWops Mini-CWT Test | 1900Z-2000Z, May 19 |
| NAQCC CW Sprint | 0030Z-0230Z, May 20 |
| CWops Mini-CWT Test | 0300Z-0400Z, May 20 |
| RTTYOPS Weeksprint | 1700Z-1900Z, May 20 |
| EACW Meeting | 1900Z-2000Z, May 20 |
| NCCC RTTY Sprint | 0145Z-0215Z, May 21 |
| NCCC Sprint | 0230Z-0300Z, May 21 |
| K1USN Slow Speed Test | 2000Z-2100Z, May 21 |
| YOTA Contest | 0800Z-1959Z, May 22 |
| EU PSK DX Contest | 1200Z, May 22 to 1200Z, May 23 |
| Hamvention QSO Party | 1200Z-2400Z, May 22 |
| Baltic Contest | 2100Z, May 22 to 0200Z, May 23 |
| QRP ARCI Hootowl Sprint | 0000Z-0100Z, May 24 |
| K1USN Slow Speed Test | 0000Z-0100Z, May 24 |
| OK1WC Memorial | 1630Z-1729Z, May 24 |
| Worldwide Sideband Activity Contest | 0100Z-0159Z, May 25 |
| RTTYOPS Weeksprint | 1700Z-1900Z, May 25 |
| SKCC Sprint | 0000Z-0200Z, May 26 |
| Phone Weekly Test - Fray | 0230Z-0300Z, May 26 |
| CWops Mini-CWT Test | 1300Z-1400Z, May 26 |
| CWops Mini-CWT Test | 1900Z-2000Z, May 26 |
| CWops Mini-CWT Test | 0300Z-0400Z, May 27 |
| RTTYOPS Weeksprint | 1700Z-1900Z, May 27 |
| RSGB 80m Club Championship, CW | 1900Z-2030Z, May 27 |
| EACW Meeting | 1900Z-2000Z, May 27 |
| NCCC RTTY Sprint | 0145Z-0215Z, May 28 |
| NCCC Sprint | 0230Z-0300Z, May 28 |
| K1USN Slow Speed Test | 2000Z-2100Z, May 28 |
| CQ WW WPX Contest, CW | 0000Z, May 29 to 2359Z, May 30 |
| Feld Hell Sprint | 0000Z-2359Z, May 29 |
| Day of the YLs Contest | 0001Z, May 29 to 2359Z, May30 |
| K1USN Slow Speed Test | 0000Z-0100Z, May 31 |
| QCX Challenge | 1300Z-1400Z, May 31 |
| OK1WC Memorial | 1630Z-1729Z, May 31 |
| QCX Challenge | 1900Z-2000Z, May 31 |
Historical Contest Calendar
2021
