The 2026 edition of Greenday introduces an important new development: for the first time, SUPSI takes on the role of lead organizer, further strengthening its commitment to promoting sustainability and fostering dialogue with the region.

Greenday has always been conceived as an open and participatory event, during which public bodies, companies, and associations can propose short, interactive activities—such as games, demonstrations, and hands-on experiences—designed to engage audiences of all ages with issues of environmental, social, cultural, and economic sustainability.

All organizations interested in presenting an activity aligned with the spirit and objectives of the event are invited to submit their application by completing the dedicated form by 1 April 2026.

Greenday represents an opportunity for exchange and dialogue among diverse stakeholders, united by the desire to share ideas and best practices and to jointly contribute to the spread of an open, participatory, and inclusive culture of sustainability.

Further information is available on the official event website.