Global Graph Celebration Day is a global event that takes place on April 15th, marking the legacy of Swiss mathematician Leonhard Euler. The day aims to celebrate his contributions to graph theory and data analysis, which have had a significant impact on our society. Euler's work on traversing graphs with exactly one edge per node led to the concept of "degree of nodes" and the idea that any given graph can be traversed with each edge traversed exactly once if it meets certain conditions. The event is organized by Neo4j, a team that approached the community to help start this movement. The celebration will take place in various locations across 5 continents, including São Paulo, London, San Francisco, and more. Participants are encouraged to host their own events or attend existing ones, with resources available on the Global Graph Celebration Day website.