The Defense Advanced Research Projects Agency (DARPA) is hosting an in-person Proposers Day for its Crystal Palace program on December 5, 2025, at the Executive Conference Center in Arlington, VA. This event aims to introduce the program's vision, facilitate collaboration among researchers, and promote teaming arrangements to accelerate microsystem innovation through the development of new tools for rapid development of complex thin-film inorganic materials. Registration for the event is required by December 1, 2025, and is limited to 100 attendees, with specific submission requirements for non-U.S. citizens. Interested parties can contact the Crystal Palace PA Coordinator at Crystal_Palace@darpa.mil for further information.