*The exact dates of the first and the last round of each competition are finalized by the official invitation.
Official Calendar
| European Online Open Club Cup | Online | 27-Mar-21 | 31-Mar-21 |
| European Online Amateur Chess Championship | Online | 10-Apr-21 | 28-Apr-21 |
| European Parliamentary Online Chess Tournament | Online | 16-Apr-21 | |
| European Hybrid Qualification event for the FIDE World Cup | Online | 22-May-21 | 30-May-21 |
| European Individual Women’s Chess Championship | Iasi, Romania | 8-Aug-21 | 21-Aug-21 |
| European Individual Chess Championship | Reykjavik, Iceland | 26-Aug-21 | 5-Sep-21 |
| European Senior Team Chess Championship 2021 | Prague, Czech Republic | 29-Aug-21 | 8-Sep-21 |
| European Chess Club Cup 2021 | Ohrid, North Macedonia | 17-Sep-21 | 25-Sep-21 |
| European Women’s Chess Club Cup 2021 | Ohrid, North Macedonia | 17-Sep-21 | 25-Sep-21 |
| European Senior Chess Championship 2021 | Baia di Porto Conte (Sardegna), Italy | 25-Sep-21 | 5-Oct-21 |
| European Youth&Junior Chess Championships 2021 | Hybrid | 15-Oct-21 | 21-Oct-21 |
| European Team Chess Championship 2021 | Terme Catez, Slovenia | 11-Nov-21 | 22-Nov-21 |
| ECU General Assembly | Terme Catez, Slovenia | 13-Nov-21 | |
| European Online Rapid School Chess Championship 2021 | Online | 3-Dec-21 | 12-Dec-21 |
| European Rapid&Blitz Chess Championship 2021 | Katowice, Poland | 16-Dec-21 | 19-Dec-21 |
| European Youth Rapid&Blitz Chess Championship 2021 | Novi Sad, Serbia | 26-Dec-21 | 31-Dec-21 |
| European Universities Chess Championship 2021 | Belgrade, Serbia | postponed for 2022 | |
| European Amateur Chess Championship 2021 | Mali Losinj, Croatia | postponed for 2022 | |
| European Youth Team Chess Championship 2021 | Thessaloniki, Greece | postponed for 2022 | |
| European Women’s Rapid&Blitz Chess Championship 2021 | Kyiv, Lviv, Ukraine | ||
Affiliated Calendar – events under the patronage of the European Chess Union:
| Mitropa Cup 2021 | Davos, Switzerland | 3-May-21 | 12-May-21 |
| European Individual School Chess Cup 2021 | Petrovac, Montenegro | 18-Jun-21 | 27-Jun-21 |
| European Union Youth Chess Championship U8-U14 | Kouty nad Desnou, Czech Republic | 13-Aug-21 | 22-Aug-21 |
| European Small Nations Hybrid Championship 2021 | Online | 17-Apr-21 | 25-Apr-21 |
| European Small Nations Team Championship 2021 | Sliema, Malta | 27-Nov-21 | 5-Dec-21 |