The Strategy Secretariat of the ESG calls upon the particle-physics community across universities, laboratories and national institutes to provide input to the process in various forms and at various stages:

1. Submission of main input from the community by 31 March 2025 (guidelines available here)
2. Additional input from the national communities in advance of the Open Symposium (deadline 26 May 2025)
3. Participation in the Open Symposium that will take place from 23 – 27 June 2025
4. Based on the input collected (March and May 2025, and at the Open Symposium) and on the summaries in the Physics Briefing Book  (publication end September 2025), further input from the national communities is welcome ahead of the December 2025 Strategy drafting session (deadline 14 November 2025).

A major component of the community input are the “national inputs”, which are expected to be collected individually by each country (and in some cases by regions). The information collected from the different countries/regions will be most useful if it is as coherent and as uniform as possible when addressing the key issues. To assist with this, the European Committee for Future Accelerators (ECFA) has put together a set of guidelines for the collection of the national inputs.

All inputs shall be submitted via this portal. Community proposals submitted will be made publicly available in due course.