| Event | Year | Start | End | Races | Teams |
|---|---|---|---|---|---|
| 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 |
| 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 |
| Kieler Woche | 2021 | 04 Sep | 05 Sep | 5 | 26 |
| 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 |