| 1 July 2023, 12pm | Launch Date |
| 15 July 2023, 11:59pm | Registration Deadline |
| 21 July 2023, 11:59pm | Submission Closure |
| 31 July 2023 | Country Rounds: Qualifiers |
| 18 August 2023 | Country Rounds: Final |
| 1 September 2023 | Awards Ceremony |
For use by Sustainability Startathon contestants, this reference guidebook has important information on key dates, rules & regulations, and more.