G20 Calendar 2025. Here is an overview of some of the major climate events this year. Discover key political events happening across the 2025 calendar, from elections and anniversaries, to global summits and inaugurations.

South africa will host the g20 summit in 2025—exact date and venue to be confirmed—marking the country’s second time leading this significant global event. The g20 adopts a leaders’ declaration at the conclusion of the summit that states leaders’ commitment towards the priorities discussed and agreed upon during the ministerial and.