Explanation

World Cotton Day is observed on 7 October to recognize the importance of cotton worldwide.

Theme 2024: Cotton For Good 

Explanation

World Hand Hygiene Day is observed on 5 May. 

Theme 2022: Unite for safety: clean your hands

Theme 2023: Accelerate action together 

Explanation

AIDS is a pandemic disease caused by the infection of (HIV), which damages the human immune system.

World AIDS Day is observed on 1 December since 1988.

Theme 2021: End Inequalities, End AIDS

Theme 2022: Equalize

Theme 2023: Let communities lead

Theme 2024: Take the rights path: My health, my right!

Explanation

International Week of Deaf People is annually observed across the world during the last full week of September. 

Explanation

UN Russian Language Day is observed annually on June 6.

The event was established by the United Nations Educational, Scientific and Cultural Organization in 2010.

Explanation

World Liver Day is observed on 19 April

Theme 2023: Be vigilant, do a regular liver check-up, fatty liver can affect anyone

Explanation

International Quds Day is an annual pro-Palestinian event held on the last Friday of Ramadan.

In 2023, Quds Day falls on 14 April. 

Explanation

Every year, the United Nations Day is celebrated on 24 October to mark the anniversary of the UN charter, which came into force in 1945.

Theme 2022: Building back together for peace and prosperity 

Explanation

• International Day of Older Persons is observed on 1 October.

• Theme 2020: Pandemics: Do they change how we address age and ageing?

• Theme 2021: Digital Equity for All Ages

• Theme 2022: Resilience of Older Persons in a Changing World
• Theme 2023: Fulfilling the Promises of the Universal Declaration of Human Rights for Older Persons: Across Generations
• Theme 2024: Ageing with Dignity: The Importance of Strengthening Care and Support Systems for Older Persons Worldwide

Explanation

• World Hydrography Day is observed on June 21 every year to raise awareness about hydrography and the essential role that it plays in improved knowledge of the seas and oceans.
• Theme 2021: One hundred years of international cooperation in hydrography
• Theme 2022: Hydrography - contributing to the United Nations Ocean Decade