Explanation

The Great Britain handed over Hong Kong to China on 1 July 1997 after ruling over 150 years on it.

Explanation

Annually on 17th June, World Day to Combat desertification and drought  turn the degraded land into healthy land.

2021 Theme was: Restoration, Land, Recovery

Explanation

World Leprosy Day is observed on last Sunday of January.

In 2022, last Sunday of January falls on 30 January.

Leprosy: کوڑھ

Leprosy Day 2022 Theme: United For Dignity

Explanation

• World River Day is observed on fourth Sunday of September to raise awareness regarding water bodies and to promote their conservation.
• Theme 2022: The importance of Rivers to Biodiversity 
  
• Theme 2023: Recognising the importance of transboundary river cooperation
• Theme 2024: Waterways of Life

Explanation

World Thinking Day is celebrated annually on 22 February by Scout and Guide organizations around the world.

Theme 2024:  Our World, Our Thriving Future

Explanation

The ‘World Day for Safety and Health at Work’ is observed annually on April 28.

 The day is dedicated to create awareness on Occupational Safety and Health (OSH) management. 

Explanation

International Development Weak (IDW) celebrated from 6 to 12 February 2023.

Theme 2023: Go for the goals

Explanation

• October 31 was designated as World Cities Day by the United Nations in 2014.
• Theme 2020: Valuing our communities ad cities 
• Theme 2021:Adapting cities for climate resilience
• Theme 2022: Act local to go global

Explanation

World Anesthesia Day is observed on 16 October to commemorate the first successful demonstration of diethyl ether anesthesia by William T. G. Morton on 16 October 1846.

Theme 2022: Medication Safety 

Explanation

• World Arthritis Day is observed on 12 October 
• Theme 2022: It is in your hands, take action.
• Theme 2023: Living with an RMD at all stages of life.