*The exact dates of the first and the last round of each competition are finalized by the official invitation.
Official Calendar
| 1st Quarter ECU Board Meeting | Larnaca, Cyprus | 30-Jan-20 | 2-Feb-20 |
| European Online Chess Championship 2020 | chess.com | 16-May-20 | 31-May-20 |
| European Online Youth Individual & Team Chess Championship 2020 | Online | 18-Sep-20 | 20-Sep-20 |
| European Online Corporate Chess Championship 2020 | Online | 3-Oct-20 | 4-Oct-20 |
| European Online Women’s Club Cup | Online | 19-Dec-20 | 22-Dec-20 |
| European Rapid&Blitz Chess Championship 2020- Invitational | Katowice, Poland | POSTPONED | |
| ECU General Assembly | Online-Teleconference | 19-Dec-20 | |
| European Chess Club Cup 2020 | Mayrhofen, Austria | POSTPONED FOR 2021 | |
| European Chess Club Cup for Women 2020 | Mayrhofen, Austria | POSTPONED FOR 2021 | |
| European Senior Chess Championship 2020 | Jastrzebia Gora, Poland | POSTPONED FOR 2021 | |
| European Women’s Rapid&Blitz Chess Championship 2020 | Kyiv, Lviv, Ukraine | POSTPONED FOR 2021 | |
| European Individual Women’s Chess Championship 2020 | Mamaia, Romania | POSTPONED FOR 2021 | |
| European Individual Chess Championship 2020 | Terme Olimia, Slovenia | POSTPONED FOR 2021 | |
| European Youth Rapid&Blitz Chess Championship 2020 | Novi Sad, Serbia | POSTPONED FOR 2021 | |
| European Corporate Chess Championship 2020 | Rotterdam, Netherlands | POSTPONED FOR 2021 | |
| European School Chess Championship 2020 | Crete, Greece | POSTPONED FOR 2021 | |
| European Senior Team Chess Championship 2020 | Wroclaw, Poland | POSTPONED FOR 2021 | |
| European Youth Team Chess Championship 2020 | Thessaloniki, Greece | POSTPONED FOR 2021 | |
| European Amateur Chess Championship 2020 | Mali Losinj, Croatia | POSTPONED FOR 2021 | |
| European Youth Chess Championship 2020 | Antalya, Turkey | POSTPONED FOR 2021 | |
Affiliated Calendar – events under the patronage of the European Chess Union
| 3rd European School Individual Chess Cup | Budva, Montenegro | postponed | |
| European Union Youth Chess Championship 2020 U8-U14 | Kouty nad Desnou, Czech Republic | 13-Aug-20 | 22-Aug-20 |
| European Small Nations Individual Chess Championship 2020 | Monaco | 8-Nov-20 | 16-Nov-20 |