Judgment of the Court (Seventh Chamber) of 27 February 2020.#TK and Others v Land Sachsen-Anhalt.#Requests for a preliminary ruling from the Verwaltungsgericht Halle.#References for a preliminary ruling – Social policy – Equal treatment in employment and occupation – Directive 2000/78/EC – Articles 2 and 6 – Prohibition of all discrimination on grounds of age – Remuneration of civil servants – Discriminatory system of remuneration – Retrospective payment calculated on the basis of a prior discriminatory classification – New form of discrimination – Article 9 – Compensation as a result of discriminatory legislation – Time limit for making an application for compensation – Principles of equivalence and effectiveness.#Joined Cases C-773/18 to C-775/18.