| 29 July 2023 | Launch Date |
| 5 August 2023 | Registration Deadline |
| 28 August 2023 | Submission Closure |
| 1 September 2023 | Country Round: Qualifiers |
| 7 September 2023 | Country Round: Final |
| 15 September 2023 | Awards Ceremony |
For use by Sustainability Startathon contestants, this reference guidebook has important information on key dates, rules & regulations, and more.