| Concurso | Data | Site |
| AGCW QRP/QRP Party | 1300Z-1900Z, May 1 | https://www.agcw.de/contest/qrp-qrp |
| RCC Cup | 0300Z-0859Z, May 2 | https://www.contest.ru/rcc-cup-rules/ |
| SBMS 2.3 GHz and Up Contest | 0600 local, May 2 to 2359 local, May 3 | https://w6ife.com/Page/2GHzContest |
| ARI International DX Contest | 1200Z, May 2 to 1159Z, May 3 | https://www.ari.it/ |
| 7th Call Area QSO Party | 1300Z, May 2 to 0700Z, May 3 | http://7qp.org/ |
| Indiana QSO Party | 1500Z, May 2 to 0300Z, May 3 | http://www.hdxcc.org/inqp/rules.html |
| Delaware QSO Party | 1700Z, May 2 to 2359Z, May 3 | https://www.fsarc.org/ |
| New England QSO Party | 2000Z, May 2 to 2359Z, May 3 | https://neqp.org/rules/ |
| MIE 33 Contest | 2300Z, May 4 to 0300Z, May 5 | https://www.ztv.ne.jp/isoda/33/annual/49/49rule-e.html |
| ARS Spartan Sprint | 0000Z-0200Z, May 5 | http://ars-qrp.com/Spartan_Sprint/Spartan_Sprint.html |
| VOLTA WW RTTY Contest | 1200Z, May 9 to 1200Z, May 10 | http://www.contestvolta.it/rules.pdf |
| CQ-M International DX Contest | 1200Z, May 9 to 1159Z, May 10 | https://cqm.srr.ru/en/rules/ |
| SKCC Weekend Sprintathon | 1200Z, May 9 to 2359Z, May 10 | https://www.skccgroup.com/operating_activities/weekend_sprintathon/ |
| 4 States QRP Group Second Sunday Sprint | 0000Z-0200Z, May 11 | http://www.4sqrp.com/SSS/sss_rules_revised_02_2026.pdf |
| NZART Sangster Shield Contest | 0800Z-1100Z, May 16 | https://www.nzart.org.nz/activities/contests/sangster-shield |
| His Maj. King of Spain Contest, CW | 1200Z, May 16 to 1200Z, May 17 | https://concursos.ure.es/en/s-m-el-rey-de-espana-cw/bases/ |
| EU PSK DX Contest | 1200Z, May 16 to 1200Z, May 17 | https://eupsk.club/eupskdx/eupskdxrules.pdf |
| Arkansas QSO Party | 1400Z, May 16 to 0200Z, May 17 | http://www.arkqp.com/ |
| Baltic Contest | 2100Z, May 16 to 0200Z, May 17 | http://www.lrsf.lt/en/ |
| Run for the Bacon QRP Contest | 2300Z, May 17 to 0100Z, May 18 | http://qrpcontest.com/pigrun/ |
| NTC QSO Party | 1900Z-2000Z, May 21 | https://pi4ntc.nl/ntcqp/ |
| QRP ARCI Hootowl Sprint | 0000Z-0100Z, May 25 | http://qrparci.org/contest/hoot-owl-sprint |
| SKCC Sprint | 0000Z-0200Z, May 27 | https://www.skccgroup.com/operating_activities/weekday_sprint/ |
| CQ WW WPX Contest, CW | 0000Z, May 30 to 2359Z, May 31 | https://www.cqwpx.com/logcheck/ |
