Details of four time periods
| Date | Name | Description |
| 1 April 2020 to 30 September 2020 | T1 | End of wave 1. Lifting of national lockdown in June followed by series of local lockdowns. |
| 1 October 2020 to 28 February 2021 | T2 | Wave 2. Two periods of national lockdown and the tier system. |
| 1 March 2021 to 31 May 2021 | T3 | Gradual easing of restrictions. |
| 1 June 2021 to 31 October 2021 | T4 | Wave 3. End of all restrictions. |