The IEEE Real-Time Systems Symposium (RTSS) is the premier conference in the field of real-time systems, and is a venue for researchers and practitioners to showcase innovations covering all aspects of real-time systems, including theory, design, analysis, implementation, evaluation, and experience. RTSS'20, celebrating the 41st anniversary of the event, continues the trend of making RTSS an expansive and inclusive event, striving to embrace new and emerging areas of real-time systems research.