World Elders Day (also known as the International Day of Older Persons) is observed on which date every year according to the United Nations calendar?

Introduction / Context:
World Elders Day, more formally known as the International Day of Older Persons, is an important observance that highlights the contribution of elderly people to families, communities, and national development. Many competitive exams in India and abroad ask questions about such international days and their exact dates, because they are frequently mentioned in government schemes, social campaigns, and awareness programmes. Knowing the correct date for this day helps you connect current affairs, social justice issues, and welfare policy for senior citizens.

Given Data / Assumptions:

• The question is asking for the fixed calendar date on which World Elders Day or International Day of Older Persons is observed every year.
• The options provide four specific dates in September, October, and November.
• We assume the question is referring to the United Nations designated observance.
• No year is mentioned in the question, so the answer refers to a recurring annual date.

Concept / Approach:
The key concept tested here is memory of important international days and their association with social themes, in this case the welfare of older persons. The United Nations General Assembly proclaimed the International Day of Older Persons to draw attention to ageing populations and the rights, dignity, and care of senior citizens. For exam purposes, you mainly need to remember that World Elders Day or International Day of Older Persons is observed on 1 October every year. The approach is therefore straightforward recall of the correct date linked with a specific observance name.

Step-by-Step Solution:
Step 1: Identify that World Elders Day and the International Day of Older Persons refer to the same UN observance focused on senior citizens.Step 2: Recall that the United Nations declared this observance to be held annually on 1 October.Step 3: Compare this remembered date with the given options: 30 October, 1 November, 30 September, and 1 October.Step 4: Confirm that 1 October appears exactly as option D, matching the known UN observance date.Step 5: Select 1 October as the correct answer.

Verification / Alternative check:
A quick verification method is to associate 1 October with older persons and 2 October with Mahatma Gandhi and the International Day of Non Violence. This pairing of consecutive dates helps you cross check: 1 October relates to older persons, while 2 October relates to non violence and Gandhi. Remembering these adjacent observances strengthens recall and acts as an internal check that 1 October is correct for World Elders Day.

Why Other Options Are Wrong:
30 October is not linked with the UN observance for older persons and is therefore incorrect. 1 November is also not associated with this specific international day, so it is wrong. 30 September is close to the correct date but is still not the official UN designated day, making it a common trap but incorrect. Only 1 October correctly matches the official International Day of Older Persons.

Common Pitfalls:
A frequent mistake is to confuse 1 October with other nearby observances in late September and early October. Students may also mix up the International Day of Older Persons with various national level days for senior citizens in different countries. Another pitfall is to assume that because the term Elders Day sounds informal, the date can vary, but for examination purposes you must treat it as the fixed UN date of 1 October. Careful reading of the options and linking the observance clearly with the United Nations helps avoid such confusion.

Final Answer:
The correct date for World Elders Day or the International Day of Older Persons is 1 October.