Explanation

World Osteoporosis Day is observed annually on October 20th for raising global awareness and treatment of osteoporosis and metabolic bone disease.

Theme 2020: That`s Osteoporosis

Theme 2021: Take action for bone health

Theme 2022: Step up for bone Health

Explanation

Disarmament Week is observed annually from 24 October to 30 October by the United Nations to promote world peace. 

Disarmament Week was first observed in 1978.

UNO was also established on 24 October. 

Explanation

World Stroke Day is observed on October 29 to underscore the serious nature and high rates of stroke.

Explanation

World Thrift Day is marked every year on 31 October in order to raise awareness about the importance of savings.

Explanation

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

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

 Theme 2025:Fund Resilience, Not Disasters

****

Explanation

• International Day of the Girl Child is observed on 11th October.
• First observed in 2012
• Theme 2024: Girls' Vision for the Future
• Theme 2025: The girl I am, the change I lead: Girls on the frontlines of crisis
• ****

Explanation

• The Pentagon is the headquarters of the United States Department of Defense (DoD).
• It is located in Arlington County, Virginia, near Washington, D.C.
• Construction started: 11 September 1941
• Completed: 15 January 1943
• It was constructed on an accelerated schedule during World War II.
• The building has 7 floors, including 2 underground levels.
• Architects: George Bergstrom and David J. Witmer.

Last verified on 04-10-2026

Explanation

• AD stands for Anno Domini.
• It is a Latin term meaning “in the year of our Lord.”
• It is used for years in the traditional Christian calendar.
• For example, AD 2026 means the year 2026 in the AD system.

Additional information:

• BC: Before Christ
• CE: Common Era
• BCE: Before Common Era

Last verified on 30-09-2026

Explanation

• Vladimir Putin has served continuously as president or prime minister since 1999:
• As prime minister from 1999 to 2000 and from 2008 to 2012,
• As president from 2000 to 2008, and since 2012
• Born: 7 October 1952, Leningrad, Russian SFSR, Soviet Union
• Party: Independent (1991–1995, 2001–2008, since 2012)

Last updated by NA on 27 April 2026

Explanation

• WINDOWS = Wide Interactive Network Development for Office Work Solution.
• Developer: Microsoft
• Type: Operating System (OS)
• First released: 1985
• Founders of Microsoft: Bill Gates and Paul Allen
• First Windows version: Windows 1.0
• Latest major version: Windows 11