| Call for Plenary and Parallel Sessions opens | 10th February 2023 |
| Call for Plenary and Parallel Sessions closes | 12th April 2023 included |
| Submission of abstracts for Sessions opens | 26th May 2023 |
| Call for Topical Discussion Meetings opens | 26th May 2023 |
| Registration for ESWW2023 (in-person/hybrid/virtual) | June 1 2023 |
| Submission of applications for financial support opens | June 1 2023 |
| Deadline abstracts of oral presentations for Sessions | 29th June 2023 included |
| Deadline of applications for financial support | 29th June 2023 included |
| Call for Topical Discussion Meetings closes | 29th June 2023 included |
| Release of Session and TDM Programme | Late August 2023 |
| Decision on the financial support | End of July |
| Deadline Early-Bird registration (in-person/hybrid/virtual) | 13th September 2023 included (23:59CEST) |
| Deadline abstracts of posters for Sessions | 13th September 2023 included (23:59CEST) |
| Late (in-person) Registration Deadline | 25th October 2023 |
| Late (hybrid/virtual) Registration Deadline | 3rd November 2023 |
| Onsite registration | 20-24 November 2023 |
