United Nations Day – UN Charter, Organs, Facts and MCQs
Why 24 October is UN Day, with the Charter, founding members, principal organs and MCQs.
Fact-checked: 19 July 2026
Introduction and Background
United Nations Day is observed on 24 October. It marks the anniversary of the entry into force of the Charter of the United Nations in 1945. With ratification by the required signatories, including the five permanent members of the Security Council, the United Nations formally came into existence.
The UN was founded with 51 member states and now has 193 members. Its headquarters is in New York. The organisation has six principal organs: the General Assembly, Security Council, Economic and Social Council, International Court of Justice, Secretariat and Trusteeship Council.
Competitive examinations frequently ask the Charter-signing date, foundation date, headquarters, principal organs, permanent members of the Security Council and the location of the International Court of Justice. Students should also distinguish principal organs from specialised agencies such as WHO, UNESCO, ILO and FAO.
Exam strategy: First learn the date and central personality or institution. Next connect the day with one constitutional article, treaty, organisation, headquarters, discovery or historical event. Finally, revise the “Do Not Confuse” box because examinations often place two similar observances in the same question. This method converts a simple date into a complete static-GK unit for APPSC, TSPSC, UPSC, SSC, Railway, Banking and Police examinations.
2026 Current-Affairs Update
Easy Memory Trick
Important Facts Table
| Point | Exam Fact |
|---|---|
| Date | 24 October |
| UN Charter signed | 26 June 1945 |
| Charter entered into force | 24 October 1945 |
| Founding members | 51 |
| Present membership | 193 |
| Headquarters | New York |
| Principal organs | 6 |
| ICJ location | The Hague, Netherlands |
Related Static GK
United Nations Charter and purposes Six principal organs Security Council permanent members UN specialised agencies and headquarters
- United Nations Charter and purposes
- Six principal organs
- Security Council permanent members
- UN specialised agencies and headquarters
Do Not Confuse
Quick Revision Points
- Date: 24 October
- UN Charter signed: 26 June 1945
- Charter entered into force: 24 October 1945
- Founding members: 51
- Present membership: 193
- Headquarters: New York
- Principal organs: 6
- ICJ location: The Hague, Netherlands
United Nations Day – 10 MCQs
The UN Charter entered into force on this date in 1945.
The Charter became effective in 1945.
It was signed at the San Francisco Conference.
Fifty-one states were original members.
The membership has stood at 193 since South Sudan joined.
The main headquarters is in New York City.
The Charter establishes six principal organs.
The ICJ sits at the Peace Palace in the Netherlands.
The General Assembly is one of six principal organs.
WHO is linked to the UN system but is not a principal organ.
Frequently Asked Questions
When is United Nations Day observed?
It is observed on 24 October.
Why is this topic important for competitive exams?
It combines a direct date with related history, institutions, personalities, constitutional provisions or international organisations, making it suitable for one-mark and statement-based questions.
Should the annual theme be memorised?
Memorise it when it has been issued by the responsible official organisation. Recheck it before each year’s examination because themes may change.
What is the fastest revision method?
Use the memory trick, read the facts table once, cover it, recall five facts aloud, and then attempt all ten MCQs.
Related Learn With Mahesh Links
- Important Days in October
- Important Days and Dates Master Hub
- Constitution Day of India
- Human Rights Day
- Independence Day of India
Official Sources and References
Year-specific themes may change. Recheck the responsible organisation before republishing this content in a later year.
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