The QF Days, the annual conference of the Cluster of Excellence QuantumFrontiers, brought together over 270 scientists in Hanover on 27 and 28 May 2024. With (guest) lectures, poster sessions and networking events, the QF Days provided a wide range of opportunities for members of the Cluster of Excellence to discuss research at the limits of what can be measured and to develop new ideas together. For the QF Days, researchers from the various QuantumFrontiers institutions in Hanover, Braunschweig and Bremen as well as international guests such as Professor Vladan Vuletic (Massachusetts Institute of Technology - MIT) and Professor Sonia Garcia Blanco (University of Twente) gathered at the Maritim Hotel at Hanover Airport.