What year was the United Nations established?

The establishment of the United Nations in 1945 marked a significant moment in international relations following World War II. The UN was created to promote peace, security, and cooperation among nations, and its founding charter was signed on October 24, 1945, in San Francisco. This date is commemorated annually as United Nations Day. The creation of the UN aimed to prevent the kind of conflicts that had devastated the world during the early 20th century and sought to foster international dialogue and collaboration on various global issues.

The other years listed do not correlate with the founding date of the organization. For example, 1940 was well before the United Nations was established and during a period of significant global turmoil. As for 1950, this year falls within the early years of the UN's operations, while 1960 came later and is associated with the decolonization movement, where many new member states joined the UN. Thus, 1945 is recognized as the correct answer for the year of the UN's establishment.