The 4th Annual H2-Aero Symposium, organized by the Vertical Flight Society in Long Beach, California, is set to showcase the latest advancements in hydrogen aviation. The event, scheduled for April 2–3, 2025, will host leading experts from governments, aircraft manufacturers, and hydrogen/fuel cell industries, all focused on accelerating the adoption of hydrogen in aviation. The Symposium's theme, 'Pushing the Envelope,' highlights the industry's commitment to decarbonizing aviation with hydrogen. Key industry players such as Boeing, Joby Aviation, and ZeroAvia will present cutting-edge innovations, alongside hydrogen technology companies like GTL and PowerCell. Government representatives from the FAA, CAA, and EASA will offer insights into regulatory frameworks and policies supporting hydrogen adoption in aviation. The event aims to foster collaboration and knowledge exchange among stakeholders to drive sustainable practices in the aviation sector. With platinum sponsors like Joby Aviation and United Therapeutics, the Symposium underscores the significant industry interest in hydrogen technologies. Exhibitors will showcase advancements in hydrogen applications for various aircraft types, including drones and conventional takeoff and landing aircraft. The selection of Long Beach, California, as the event location reflects the state's proactive stance on supporting hydrogen technology for transportation. VFS's history of promoting technological cooperation in the aviation industry underscores the importance of collaborative efforts in advancing air mobility solutions. The Symposium serves as a platform for industry leaders, government officials, and researchers to explore the vast potential of hydrogen in transforming aviation towards a more sustainable and environmentally friendly future.