| Event | Date |
|---|---|
| Start of the first round | 15 September 2020 |
| SOI Workshops | October–November 2020 |
| End of the first round | 30 November 2020 |
| SOI Day | 9 January 2021 |
| SOI Camp | 11–13 and 22–24 February 2021 |
| Second round theoretical part (2T) | 6 March 2021 |
| Second round practical part (2P) | 12–16 March 2021 |
| Finals | 13/14 and 20/21 May 2021 |
| EGOI in Zurich | 13–19 June 2021 |
| IOI in Singapore | 20–27 June 2021 |
| CEOI in Croatia | Summer 2021 |