Important National and International Days

World Habitat Day is observed on the first Monday of October each year. While the specific date varies annually (October 3rd, 6th, 7th, etc. depending on the year), 3 October is a correct occurrence for World Habitat Day, notably in 2005 when it was themed 'Millennium Development Goals and adequate shelter for all'.

World Animal Welfare Day is observed globally on October 4th to raise awareness about animal welfare standards and improve conditions for animals worldwide. The date coincides with the feast of St. Francis of Assisi, the patron saint of animals.

Indian Air Force Day is celebrated on October 8th every year to mark the establishment of the IAF in 1932. The day is commemorated with air displays and parades at Hindon Air Force Station, showcasing the IAF's capabilities and honoring its role in national defense.

World Post Office Day is celebrated on October 9th each year to commemorate the establishment of the Universal Postal Union (UPC) in 1874. The day highlights the importance of postal services in global communication and connecting people worldwide.

National Post Day is observed in India on October 10th to recognize the role of the postal sector in the country's socio-economic development. The day celebrates the postal network's contribution to communication across India's diverse geography.

World Food Day is observed annually on October 16th to commemorate the founding of the Food and Agriculture Organization (FAO) of the United Nations in 1945. The day promotes global awareness and action for those suffering from hunger and highlights the need for food security.

Both United Nations Day and World Development Information Day are officially observed on October 24. This date marks the anniversary of the UN Charter's entry into force in 1945. October 24 was chosen as the founding date of the United Nations.

Indian Air Force Day is celebrated on October 8 every year, marking the official establishment of the Indian Air Force in 1932. The day is commemorated with parades and air displays at Hindon Air Force Station.

World Food Day is celebrated on October 16 every year to commemorate the founding of the Food and Agriculture Organization (FAO) of the United Nations in 1945. It promotes awareness and action against hunger and malnutrition worldwide.

World Post Office Day is celebrated on October 9 every year, marking the anniversary of the establishment of the Universal Postal Union (UPU) in 1874. The UPU coordinates postal policies among member nations.

World Animal Day is celebrated on October 4th annually to raise awareness about animal welfare across the globe. This date was chosen to honor the feast day of St. Francis of Assisi, the patron saint of animals. The other dates listed do not correspond to any major animal welfare observance.

United Nations Day is celebrated on October 24th to commemorate the anniversary of the UN Charter entering into force in 1945. This date marks the official establishment of the United Nations organization and is observed by all member states. October 15, 25, and 30 are not associated with UN Day.

The UN International Day for Disaster Reduction is observed on October 13th to promote a global culture of disaster risk reduction and awareness. Established in 1989, this day encourages communities and governments to focus on disaster prevention and preparedness strategies. October 12, 14, and 24 are incorrect dates for this observance.

World Standards Day is celebrated on October 14th to honor the efforts of thousands of experts who develop voluntary technical standards that benefit the global economy. The date marks the anniversary of the founding of the International Organization for Standardization (ISO) in 1947. October 13, 15, and 16 are incorrect dates.

Universal Children's Day, established by the United Nations, is observed on November 20th annually. This date was chosen to commemorate the adoption of the Declaration of the Rights of the Child by the UN General Assembly in 1959 and the Convention on the Rights of the Child in 1989. India celebrates Children's Day on November 14th (Jawaharlal Nehru's birthday), but the question specifically asks for the Universal (not Indian) date.