Explanation

World Hand Hygiene Day is observed on 5 May. 

Theme 2022: Unite for safety: clean your hands

Theme 2023: Accelerate action together 

Explanation

International day for disaster risk reduction is observed on 13th of October annually

Theme 2023: Fighting inequality for a resilient future

Theme 2024: Empowering the next generation for a resilient future.

Explanation

•  World Alzheimer Day is observed on 21 September to raise awareness about the challenges that patient faces due to dementia.
• Theme 2022: Change the journey, moving fear to hope after dementia diagnosis
• Theme 2023: Never too early, never too late
• Theme 2024: Time to act on dementia, Time to act on Alzheimer's

Explanation

World Leprosy Day is observed on last Sunday of January.

In 2023, last Sunday of January falls on 29 January.

Leprosy: کوڑھ

Leprosy Day 2023 Theme: Act Now; end leprosy 

Explanation

•  'World Water Week 2022' celebrated from  23 August to 1 September.
• Theme 2022: Seeing the Unseen: The Value of Water 

Explanation

World Youth Skills Day is celebrated on 15 July.

Theme 2020: skills for a resilient youth

Theme 2021: Reimagining Youth Skills Post Pandemic

Theme 2022: Transforming youth skills for the future

Explanation

World Youth Skills Day is celebrated on 15 July.

Theme 2020: skills for a resilient youth

Theme 2021: Reimagining Youth Skills Post Pandemic

Theme 2022: Transforming youth skills for the future

Explanation

Every year June 30 is celebrated as World Social Media day to highlight how it has emerged as a key tool for communication.

Explanation

The International Day for the Abolition of Slavery is observed on 2 December annually.

Theme 2021: Ending Slavery’s Legacy of Racism: A Global Imperative for Justice

Theme 2022: Stories of Courage: Resistance to Slavery and Unity against Racism  

Explanation

World Standards Day (or International Standards Day) is observed on 14th October annually to spread awareness about the importance of standardization to the global economy. 

Theme 2024: Shared Vision for a Better World