This study aims to investigate the efficacy of global civil society actors’ efforts at the local level in fostering multistakeholder collaboration, with a specific focus on Earth Hour Malang through Ngalam Petengan agenda. Additionally, the study examines the diverse participation of stakeholders in Ngalam Petengan aimed at addressing environmental challenges. The results show that government entities, businesses, academia, media, and local communities actively engage and cooperate in advancing environmental protection initiatives through Ngalam Petengan. This cooperative engagement correlates with the Pentahelix model, recognized as a developmental collaborative framework. This study contributes significantly to understanding GCS dynamics at the local level and underscores the essential role of the Pentahelix model in addressing global issues. However, specific geographical locations and local actors are the limits of the study. Future research should focus on the broader scale to explore how multistakeholder collaboration responds to global issues, particularly environmental challenges.