World Water Day, recognised by the United Nations to highlight the importance of freshwater, is observed on which date?

Introduction / Context:
World Water Day is a key United Nations observance that focuses on the importance of freshwater resources and sustainable water management. It serves as a reminder of global water scarcity, sanitation issues, and the need for policy level and community level action. For exam aspirants, remembering the exact date of World Water Day is important because questions about UN observance days regularly appear in static GK and environment related sections.

Given Data / Assumptions:

• The question asks for the date on which World Water Day is observed.
• It explicitly mentions that this is a UN recognised observance focused on water.
• Four dates in different months are given as options.
• We assume the candidate has basic awareness of environment related international days.

Concept / Approach:
World Water Day is observed every year on 22 March. It was established by a United Nations resolution in the early nineteen nineties and is meant to draw attention to water related issues worldwide. The conceptual approach is to link environmental themes with their respective dates, for example World Water Day on 22 March and World Environment Day on 5 June. This mental mapping helps avoid confusion between similar sounding observances.

Step-by-Step Solution:
Step 1: Note that the observance asked is World Water Day and that it is officially recognised by the United Nations. Step 2: Recall from environment GK that World Water Day is connected with the month of March. Step 3: Remember specifically that the date fixed for World Water Day is 22 March every year. Step 4: Compare this remembered date with all the options provided in the question. Step 5: Select option B, 22 March, because it fully matches the official date for World Water Day.

Verification / Alternative check:
Verification can be done by checking standard environment and ecology textbooks, United Nations web pages listing international days, and competitive exam monthly magazines that highlight 22 March as World Water Day. Many schools and colleges also conduct water conservation campaigns or seminars on this exact date, which makes it easier to remember. Cross referencing at least two independent reliable sources that agree on 22 March is usually enough for exam confidence.

Why Other Options Are Wrong:
Option A, 21 January, is not associated with World Water Day and therefore is incorrect for this question.
Option C, 27 October, does not match any major UN water specific observance and is given only as a distractor.
Option D, 24 February, is not the recognised date for World Water Day and should not be selected.

Common Pitfalls:
Students sometimes mix up World Water Day with World Wetlands Day, World Environment Day, or Earth Day, each of which falls on different dates. Another frequent mistake is to remember only the month of March but guess the wrong date, such as 21 March, which is often linked to other international observances. To avoid such confusion, it is helpful to create a small month wise chart that clearly lists 22 March for World Water Day alongside other environment related days.

Final Answer:
World Water Day, recognised by the United Nations, is observed every year on 22 March.