A. World Cancer Day
B. World Wetlands Day
C. International Mother Language Day
D. World Thinking Day

Background about World Wetlands Day

World Wetlands Day is observed every year on 2 February to raise awareness about the importance of wetlands for people, biodiversity, and the environment. The day commemorates the adoption of the Ramsar Convention on Wetlands, signed on 2 February 1971 in Ramsar, Iran.

Wetlands—including marshes, swamps, peatlands, mangroves, lakes, and rivers—play a crucial role in water purification, flood control, carbon storage, and providing habitats for countless plant and animal species.