United Nation Day 2025 Theme. Land restoration, desertification and drought resilience. United nations day is observed in australia on 24 october each year to commemorate the entry into.

United nations day is observed in australia on 24 october each year to commemorate the entry into. Held under the theme ‘this world energy day, be the change’, the 2025 campaign emphasises energy efficiency, carbon footprint reduction, renewable and clean energy use,.