ACM DEBS 2021 The 15th ACM International Conference on Distributed and Event-Based Systems June 28 - July 2, 2021 Milan, Italy https://2021.debs.org/ Over the past decade, the ACM International Conference on Distributed and Event‐Based Systems (DEBS) has become the premier venue for cutting-edge research in the field of event processing and distributed computing, and the integration of distributed and event-based systems in relevant domains such as Big Data, AI/ML, IoT, and Blockchain. The objectives of ACM DEBS are to provide a forum dedicated to the dissemination of original research, the discussion of practical insights, and the reporting of experiences relevant to distributed systems and event‐based computing. The conference aims at providing a forum for academia and industry to exchange ideas through its tutorials, research papers, and the Grand Challenge. * Highlights: - Two new paper categories: Experiments & Benchmarks, Vision - Two special focus areas: Machine Learning for Complex Event Processing, Distributed and Event-Based Systems for the COVID-19 Pandemic - Journal Special Issue in Information Systems for selected top-rated papers - Reproducibility guidelines * Keynote Speakers: - Carlo Curino, Microsoft Gray Systems Lab - Yanlei Diao, Ecole Polytechnique & Univ. of Massachusetts Amherst - Martin Kleppmann, University of Cambridge * Important Dates (Research Track): Abstracts due : February 26, 2021 Papers due : March 5, 2021 Author notification : April 19, 2021 Camera-ready due : May 14, 2021 * For further details, please see: https://2021.debs.org/call-for-research-papers/