The ERC published a note informing about the tentative planning at the beginning of Horizon Europe:
Starting, Consolidator and Advanced Grant calls (as well as Proof of Concept calls) are expected to be launched in 2021 (and all consecutive years). Interviews for Advanced Grant candidates will likely be introduced in 2021.
The timing of these calls will be shifted in 2021 due to the transition to the new Framework Programme. First calls are expected to open in January 2021.