This is the final call for registrations for the program on higher structures in geometry and physics to be held at MATRIX [http://www.matrixatmelbourne.org.au] (a new research institute outside of Melbourne, VIC, Australia) from June 5 — 18, 2016. Registration should be done at [http://www.matrixatmelbourne.org.au/events/higher-structures-in-geometry-and...] by April 30. Workshop June 6 — 10. Higher Structures. Clark Barwick: Parametrised Higher Category Theory and Parametrised Higher Algebra Philip Hackney & Marcy Robertson: infinity properads Ralph Kaufmann: Feynman categories Martin Markl: Operad-like structures, pasting schemes and graph complexes Emily Riehl: weak complicial sets Victor Turchin: Embedding calculus and the little discs operads Conference June 15 — 17. Higher Structures: Advances. Best regards, Philip Hackney and Marcy Robertson [For admin and other information see: http://www.mta.ca/~cat-dist/ ]