Haskell is an advanced purely-functional programming language. Rewriting is the science of replacing equals by equals and thus a very powerful method for dealing with equations. There are strong connections between Haskell programming and rewriting. Therefore, we announce a new workshop, International Workshop on Haskell And Rewriting Techniques (HART 2013) http://www.imn.htwk-leipzig.de/HART2013/ to be held on June 27, in conjunction with RDP 2013, in Eindhoven. (RDP contains RTA, the main rewriting conference.) We plan a half day of discussions, in an informal setting, on how Haskell and rewriting techniques and theories can cross-fertilize each other. Topics of interest are, for example, equational reasoning and other rewriting techniques for program verification and analysis; lambda calculi and type systems for functional programs and higher order rewriting systems; rewriting of type expressions in the type checker; rewriting of programs by refactoring tools, optimizers, code generators; execution of programs as a form of graph rewriting; template Haskell, introducing a rewriting-like macro language into the compilation process. This list of topics is non-exclusive. If you have a contribution that connects Haskell and rewriting, then submit. When in doubt, contact a member of the PC. Program committee: Alcino Cunha (U Minho) Jürgen Giesl (RWTH Aachen) Andy Gill (U of Kansas) Johan Jeuring (U Utrecht) Keisuke Nakano (UEC Tokyo) Kristoffer H Rose (IBM Watson) (co-chair) Christian Sternagel (JAIST) Janis Voigtländer (U Bonn) Johannes Waldmann (HTWK Leipzig) (co-chair) Dates: May 6: deadline for submissions May 20: notification of acceptance June 27: workshop Submission and Proceedings: Two categories of submissions are invited: Extended abstracts. Presenting original research, and also preliminary reports of work in progress. Will be included in the proceedings. Presentation-only papers. Describing work recently published or submitted. Will not be included in the proceedings. Papers should be at most 5 pages in length, and should use the easychair.cls style. Submission is handled through the EasyChair HART2013 page, https://www.easychair.org/conferences/?conf=hart2013 In line with the informal style of the workshop, the reviewing of submissions will be light. When accepting and scheduling presentations, preference will be given to original research. Proceedings will be made available electronically at the workshop.