Case C-193/17: Judgment of the Court (Grand Chamber) of 22 January 2019 (request for a preliminary ruling from the Oberster Gerichtshof — Austria) — Cresco Investigation GmbH v Markus Achatzi (Reference for a preliminary ruling — Charter of Fundamental Rights of the European Union — Article 21 — Equal treatment in employment and occupation — Directive 2000/78/EC — Article 2(2)(a) — Direct discrimination on grounds of religion — National legislation granting certain employees a day’s holiday on Good Friday — Justification — Article 2(5) — Article 7(1) — Obligations of private employers and national courts resulting from the incompatibility of national law with Directive 2000/78)