Dear all, The ACM Conference on Recommender Systems (RecSys) in Prague (Sep 22-26, 2025) solicits proposals for tutorials and workshops. RecSys is an excellent opportunity to share knowledge with a specific audience and to drew attention to specific topics. All details on tutorial submissions: https://recsys.acm.org/recsys25/call/#content-tab-1-4-tab All details in workshop submissions: https://recsys.acm.org/recsys25/call/#content-tab-1-5-tab Tutorials The goal of the tutorials is to provide conference attendees, including early-career researchers and researchers crossing over from related disciplines, with an opportunity to learn about recommender system concepts and techniques. Tutorials also serve as a venue to share presenters' expertise with the global community of recommender system researchers and practitioners. Each tutorial will provide in-depth coverage of an established recommender systems subtopic, introduce an emerging application of recommendation technologies, or update the recommender systems community on recent advances in related fields. Workshops In 2025, our goal is to have a balanced workshop program, which comprises workshop formats of different types and a combination of newly emerging, currently evolving, and historically understudied topics. Different full-day and half-day workshop formats are possible, for example: * Workshops with novel interactive formats and a relatively small number of participants. Such workshop formats might for example target the exploration of a certain topic during the workshop through a moderated discussion or breakout sessions, resulting in a draft paper or report to be completed and published after the workshop. Or they might focus on datasets and benchmarking for a particular problem or domain. Particular priority will be given to these formats which require the active involvement of the participants. * Workshops with the traditional workshop format on specialized topics. Such workshops typically have their own paper submission and review processes. Proposals for the continuation of an existing workshop series are welcome. However, please include a brief statement on the necessity for the new edition, including a description of the outcomes of previous years and the expected novelty of this edition. All details can be found on our website: https://recsys.acm.org/recsys25/call/#content-tab-1-5-tab Kind regards, Alain Starke Publicity Co-Chair ACM RecSys 2025