Judgment of the Court (Seventh Chamber) of 13 January 2022.#DS v Koch Personaldienstleistungen GmbH.#Request for a preliminary ruling from the Bundesarbeitsgericht.#Reference for a preliminary ruling – Social policy – Charter of Fundamental Rights of the European Union – Article 31(2) – Directive 2003/88/EC – Organisation of working time – Article 7 – Annual leave – Working time – Overtime – Calculation of working time on a monthly basis – No overtime pay when taking annual leave.#Case C-514/20.