Judgment of the Court (Second Chamber) of 20 June 2024.#EA v Artemis security SAS.#Request for a preliminary ruling from the Cour de cassation (France).#Reference for a preliminary ruling – Protection of the safety and health of workers – Organisation of working time – Directive 2003/88/EC – Article 9(1)(a) – Obligation to assess the health of night workers – Employer’s failure to comply with that obligation – Right to compensation – Need to establish the existence of specific harm.#Case C-367/23.