Replay '25 in London kicked off with an energetic and collaborative atmosphere, bringing together developers to engage in a hackathon and workshops centered around Temporal, a technology for building reliable distributed systems. The hackathon featured over 60 participants who formed seven teams to tackle diverse projects, including AI applications, visualization tools, and a Batch Orchestra library. Notable projects included a GUI Workflow execution visualizer and a Temporal Auction System, highlighting the versatility of Temporal across various domains. In parallel, workshops offered hands-on learning experiences in Go, Java, and .NET, helping attendees deepen their understanding of Temporal's capabilities, from error handling to distributed systems design. The event fostered an environment of creativity and learning, with participants gaining valuable skills and insights from Temporal experts. The momentum from day one set the stage for further keynotes and technical talks, promising more opportunities for innovation and collaboration throughout the conference.