| Event | Year | Start | End | Races | Teams |
|---|---|---|---|---|---|
| Turkey Bowl | 2021 | 20 Nov | 21 Nov | 4 | 12 |
| Santa Cruz Fall Regatta | 2021 | 13 Nov | 14 Nov | 9 | 7 |
| Sail Freo | 2021 | 30 Oct | 31 Oct | 8 | 12 |
| Sauna Cup | 2021 | 30 Oct | 31 Oct | 4 | 16 |
| Carl Miller Regatta | 2021 | 29 Oct | 31 Oct | 10 | 15 |
| Grand Prix de l’Armistice | 2021 | 29 Oct | 01 Nov | 9 | 12 |
| Västkustmästerskapen | 2021 | 23 Oct | 23 Oct | 5 | 10 |
| Fall Dinghy | 2021 | 23 Oct | 24 Oct | 5 | 7 |
| KZN Regional Championship | 2021 | 22 Oct | 24 Oct | 4 | 7 |
| Joachim-Hunger-Gedächtnispreis | 2021 | 16 Oct | 17 Oct | 6 | 16 |
| Trophée Jean-Michel Auclair | 2021 | 16 Oct | 17 Oct | 6 | 7 |
| Petermännchen | 2021 | 09 Oct | 10 Oct | 6 | 15 |
| KSSS Olympic Class Regatta | 2021 | 02 Oct | 03 Oct | 6 | 7 |
| Hayling Island | 2021 | 30 Sep | 03 Oct | 5 | 15 |
| North American Championship | 2021 | 30 Sep | 03 Oct | 12 | 31 |
| Finał MINUTOR Energia Puchar Polski | 2021 | 25 Sep | 26 Sep | 4 | 13 |
| Oktoberfestpreis | 2021 | 25 Sep | 26 Sep | 1 | 13 |
| CORK Fall Regatta & 505 Canadian championships | 2021 | 17 Sep | 19 Sep | 5 | 12 |
| EMK Syysregatta | 2021 | 11 Sep | 12 Sep | 4 | 15 |
| FAntastic Nepean FAll REgatta (FANFARE) | 2021 | 11 Sep | 12 Sep | 9 | 10 |
| Harris Bay Intergalactic 505 Regatta | 2021 | 11 Sep | 12 Sep | 7 | 12 |
| Kieler Woche | 2021 | 04 Sep | 05 Sep | 5 | 26 |
| Northvaal Championship | 2021 | 04 Sep | 05 Sep | 5 | 10 |
| Puchar Dziwnowa | 2021 | 04 Sep | 05 Sep | 13 | 7 |
| SWE 5o5 cup 1 | 2021 | 04 Sep | 05 Sep | 7 | 18 |
| Dansk Mesterskab | 2021 | 28 Aug | 29 Aug | 9 | 15 |
| OstseeCup | 2021 | 21 Aug | 22 Aug | 5 | 15 |
| Nepean One Design Regatta | 2021 | 14 Aug | 15 Aug | 6 | 11 |
| TPS Airisto Regatta | 2021 | 14 Aug | 15 Aug | 4 | 9 |
| Svenskt Mästerskap | 2021 | 13 Aug | 15 Aug | 8 | 29 |
| Buzzards Bay Regatta | 2021 | 07 Aug | 08 Aug | 6 | 13 |
| Mistrzostwa Polski | 2021 | 06 Aug | 08 Aug | 9 | 22 |
| Pacific Coast Championship – Columbia Gorge One-Design Regatta | 2021 | 31 Jul | 01 Aug | 7 | 10 |
| 505 Sakonnet Open | 2021 | 17 Jul | 18 Jul | 7 | 7 |
| UK National Championship | 2021 | 13 Jul | 20 Jul | 5 | 24 |
| Lotos Nord Cup | 2021 | 10 Jul | 11 Jul | 7 | 22 |
| Championnat de France | 2021 | 10 Jul | 13 Jul | 11 | 32 |
| Internationale Deutsche Meisterschaft | 2021 | 02 Jul | 11 Jul | 10 | 44 |
| Santa Cruz Summer Regatta | 2021 | 26 Jun | 27 Jun | 7 | 13 |
| Stuart Sinclair | 2021 | 12 Jun | 13 Jun | 6 | 9 |
| Puchar Pucka | 2021 | 05 Jun | 06 Jun | 4 | 20 |
| Wickford Regatta | 2021 | 05 Jun | 06 Jun | 6 | 9 |
| Kotkan Pursiseura | 2021 | 22 May | 23 May | 5 | 7 |
| East Coast Championship | 2021 | 21 May | 21 May | 9 | 12 |
| Elvstrom Zellerbach | 2021 | 15 May | 16 May | 7 | 6 |
| Regaty otwarcia sezonu | 2021 | 15 May | 16 May | 1 | 17 |
| South African National Championship | 2021 | 01 May | 04 May | 13 | 12 |
| WA Not the Nationals Series | 2021 | 15 Jan | 17 Jan | 9 | 11 |
| Helsinki Regatta | 2021 | 04 Jan | 07 Jan | 5 | 5 |