The Global Indigenous Youth Summit on Climate Change (GIYSCC) is a “virtual dialogue by, for and among Indigenous youth with global inclusion” on August 9th – circling the Earth with the Sun across three 8-hour time zones in 24 hours (00:00-24:00 GMT) on the International Day of the World’s Indigenous Peoples.  GIYSCC was initiated in 2022 by Professor Berkman as the coordinator in collaboration with the International Network for Government Science Advice (INGSA) – Africa as part of their Science Advice Skills Development Program (SASDP) mentee-mentor initiative.  GIYSCC-2023 was hosted by the United Nations Institute for Training and Research (UNITAR) with 1300+ registrants from 112+ nations across 88+ languages and partners globally, including Springer-Nature (which donated $15,000) and the International Institute of Science Diplomacy and Sustainability (IISDS) at UCSI University in Malaysia (founded by Professor Zakri).  An outcome of GIYSCC-2023 was the invited Nature Communication written by GIYSCC Indigenous Youth Leaders that Indigenous Youth Must Be at the Forefront of Climate Diplomacy, introducing the legacy concept of a Global Partnership of Indigenous Youth (in the spirit of SDG 17).   GIYSCC-2024 was hosted by FutureEarth with 800+ registrants from 100+ nations across 230+ languages.  GIYSCC-2025 also will be hosted by FutureEarth, which has created additional venues for dialogues among GIYSCC Indigenous Youth Leaders in conjunction with the Sustainability Research and Innovation (SRI) Congress virtually in Panama (2023) as well as in-person in Finland (2024) and United States (2025).   This GIYSCC Initiative also involves production of the third volume in the Informed Decisionmaking for Sustainability book series published by Springer, with GIYSCC Indigenous Youth Leaders as the co-editors of Climate Action with Global Inclusion: Perspectives, Lessons and Observations from Indigenous Youths on Climate Adaptation and Resilience, involving more than eighty submitted abstracts from Indigenous youth from Africa, Asia, Australia, Europe, North America and South America, including the Middle East, Arctic and Oceania with Small Island Developing States (SIDS) as a particular focus.