Case C-514/20: Judgment of the Court (Seventh Chamber) of 13 January 2022 (request for a preliminary ruling from the Bundesarbeitsgericht — Germany) — DS v Koch Personaldienstleistungen GmbH (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)