The inaugural World Sundial Day Online Conference took place on 20 March 2025 with more than 80 participants being present. Recordings of the presentations Martins Gills. Welcome to the conferenceFrank King. Welcome from the British Sundial SocietyEsteban Martínez Almirón. Why a World Sundial Day?Roger Torrenti. Why a MOOC and a magazine on sundials?David Harber. A …