Science Week celebrates its 30th anniversary, having spent three decades disseminating scientific research and knowledge in Catalonia. Over 1.5 million people have enjoyed some 10,500 science-related activities for all audiences. The 30th edition of Science Week (SC'25), organized by the Catalan Foundation for Research and Innovation (FCRI) with the support of the Department of Research and Universities of the Government of Catalonia, will feature more than 380 talks, guided tours, routes, exhibitions, workshops, conferences, and other activities until Sunday, November 16. The central theme of SC'25, which is supported by BBVA, Amgen, and the "la Caixa" Foundation, will be quantum technology, aiming to bring the importance of quantum science and its applications closer to the public. This election commemorates the International Year of Quantum Science and Technology (IYQ 2025), promoted by the United Nations. The thematic focus is not exclusive, as the Week maintains its multifaceted, thematically diverse philosophy, one of its distinctive features for the past three decades. The complete program of activities is available at [website address missing]. Science Week websiteThe SC'25 mobilizes, in Catalonia, more than one hundred institutions and entities in the field of research and science outreach, including universities, research centers, major infrastructure projects, academies, schools, scientific associations, libraries, museums, and companies.