The European Calcium Society (ECS) exists since 1997 as an international non-profit association. It forms in the world the largest gathering of scientists working in the calcium field with 250+ members from over 30 countries (including many non-European countries). The aim of the ECS is to develop and sustain relationships between all scientists working in the calcium field with special attention for the needs and the participation of the junior researchers in the field (e.g. via travel fellowships, discounted membership and registration fees, poster prizes, and since 2019 an own junior ECS Board) and with maximal respect for gender equality. It organizes to this aim amongst other initiatives highly successful International Meetings and workshops.