The 5th PCI Energy Days, organized by the European Commission, focuses on the practical implementation of Projects of Common Interest and Projects of Mutual Interest. The event invites representatives from EU country administrations, regulators, grid operators, and project promoters to discuss challenges and share successful examples in building and modernizing energy infrastructure to meet the EU's 2030 climate and energy targets. The two-day event includes a policy conference on cross-border cooperation, permitting experiences, finance attraction, procurement challenges, and collaborative grid planning. A PCI Garden will showcase projects from promoters and research centers. Commissioner Kadri Simson will open the event, chaired by Director-General Ditte Juul Jørgensen. The event will also follow up on the 10th Energy Infrastructure Forum in Copenhagen and discuss the EU Action Plan for Grids. The event highlights achievements in interconnected energy markets and aims to accelerate offshore renewables, smart grids, hydrogen infrastructure, and CO2 networks deployment.