Important dates | Hercules School

Hercules Annual Session 2026 will take place from February 22^nd to March 29^th 2026.

When	What
From 25^th August to 1^st October 2025	Online application to Hercules 2026
Mid-November	Decision of the selection committee acceptance letter will be sent by email
Before 1^st December 2026	Commitment to participate in Hercules 2026 and additional information Payment of the registration fees
Before 20^th December 2025 (Full-time participants only)	Creation of your ILL user account (Full-time participants only: click here) Additional mandatory documents to upload Wish list for the practicals/tutorials to fill in
Before 31^st January 2026 (Full-time participants only)	Creation of your ESRF user account Safety trainings for the ESRF and the ILL Employer authorization to access controlled radiation areas, for ILL
From February 22^th to March 29^th 2026	HERCULES 2026 annual session • Full-time participants: Arrival in Grenoble on Sunday February 22^nd, welcome between 6:00 pm and 9:00 pm at the hotel. Departure from Grenoble on Sunday March 29^th. • Part-time participants: The online programme will start on Monday Februay 23^rd in the morning and end on Thursday March 26^th evening.