Key dates and events in the proposal process are shown below. The Phase I and Phase II deadlines are highlighted.
| Date | Event | Comments |
| (varies with participant) | Proposal deadline | Proposals received by National Gemini Offices (NGOs). |
| Late October/Early November (set by participant) | NTAC meetings | Scientific assessments by each Gemini participant ("National TAC"). |
| 13 November 2020 | E-transmission | Electronic transmission of NTACs results to Gemini. |
| 3 December 2020 | ITAC | International Time Allocation Committee meets to resolve issues and recommend programs. |
| 17 December 2020 | 21A schedule and Phase IIs available | 2021A OT templates available to PIs. |
| 4 January 2021 | Phase II reviews start | The response time is 7 days for checking from "For Review" and from "For Activation". |
| 18 January 2021 | Phase II deadline | Mandatory for all PIs (earlier submission is encouraged). |
| 1 February 2021 | Start of semester 2021A | 2021A programs may be observed earlier to fill queue nights. |