The reporting period (September 2020-December 2020) was a particularly intense time in terms of important judgments on social security with no fewer than four judgments from the Grand Chamber of the Court. This overview reports five cases in total. First, there are three cases on the Posted Workers Directive. The first two are on the dismissal of the annulment procedures regarding the adoption of the new Posted Workers Directive (Directive 2018/957) started by Hungary (C-620/18) and Poland (C-626/18). Then, the FNV case (C-815/18), which is on the application of the Posted Workers Directive (Directive 96/71) to the transnational provision of services in the road transport sector, is discussed. The overview continues onto other subjects, wit...