Open Data Day (ODD) is an annual celebration of open data all over the world. Groups from likely every country create local events on the day where they will use open data in their communities. ODD is maintained and supported by the Open Knowledge Foundation (OKFN) through the Open Knowledge Network.
As a way to increase the representation of different cultures, since 2023 we offer the opportunity for organisations to host an Open Data Day event on the best date within a one-week period.
All outputs are open for everyone to use and re-use.
Thematic Focus: Open Data to Tackle the Polycrisis
Each year, the theme is deliberately broad to accommodate the most diverse practices and perspectives of working with open data for the public interest. In 2025, we want to address some of the most pressing issues of our time and go beyond climate justice. That's why we're developing the theme around the concept of polycrisis, and more specifically the intersections between poverty and multiple inequalities, violence and conflict, and climate and disaster response.