The International Conference on Harmonic Analysis and Applications (ICHAA'26) is organized by the Laboratory of Modeling and Mathematical Structures of the Faculty of Sciences and Technology of Fez on July 08–09, 2026, with the aim of bringing together leading international and national researchers in the areas of analysis on Lie groups, representation theory, integral transforms, special functions, and their applications to partial differential equations. The conference will also offer participants the opportunity to present their research projects through oral communications.