Dates, Days & Observances

Introduction

The subtopic Dates, Days & Observances is a compact yet high-yield segment of the WBCS Current Affairs syllabus. In the available pool of nine Previous Year Questions (PYQs), this subtopic has been tested every year from 2017 to 2023, covering a mix of national and international observances, anniversaries of eminent personalities, and days designated by UN bodies. The WBCS examiner tends to ask fact-based recall questions—typically “On which date is X observed?” or “Which year marked the Yth anniversary?”—sometimes with a slight analytical twist (e.g., linking the observance to its founding organisation).

Why does this subtopic matter? For a WBCS aspirant, static knowledge of dates is necessary but not sufficient. The syllabus explicitly demands awareness of national events (policy launches, appointments), international affairs (UN summits, treaties), awards and honours, sports, government schemes, defence and security, and science and technology. Many of these events have designated days (e.g., National Sports Day, World Environment Day). Mastering this subtopic means you can quickly eliminate wrong options in a 30‑second recall and also connect the observance to its broader context—e.g., linking World Soil Day (5 December) to the UN Food and Agriculture Organization and India’s soil health mission.

The nine PYQs reveal a clear pattern: the examiner favours UN‑designated international days, national commemorative days tied to a personality (e.g., Teachers’ Day), and anniversaries of cultural icons. The difficulty level is moderate—most dates are well‑known, but a few (e.g., International Day of the Tropics on 26 June, World Day for War Orphans on 6 January) require deliberate memorisation. There is one instance of a partially garbled PYQ (2019, with option‑text “1984 fas” etc.); we will not rely on that question.

In this chapter, you will learn:

• The conceptual foundation: what makes an observance “national” vs. “international”, how UN‑designated days are created, and the role of organisations like UNESCO, WHO, FAO.
• A detailed walkthrough of every major category—UN days, Indian national days, award‑linked observances, sports days, defence‑exercise days, and science/space days.
• How to solve PYQs step by step, with special attention to traps (e.g., confusing Teachers’ Day with World Teachers’ Day, mixing up dates for Ozone Day and Customs Day).
• A custom memory‑aid system that organizes 40+ must‑know dates into digestible chunks.

By the end, you will not only recall dates correctly but also understand why a particular date was chosen, which is how the examiner sometimes rephrases the question (e.g., “Which day was established by UNGA Resolution …?”). Let us begin from first principles.

Core Concepts & Foundations

Before diving into specific observances, we must build a vocabulary of key terms. Every observance fits into one of several categories, each with its own rationale and authority. The WBCS syllabus expects you to know not just the date but also the sponsoring organisation and, occasionally, the year of first observance.

Term: National Day
A day designated by a country’s government to commemorate a significant event in its history (e.g., Republic Day, Independence Day) or to honour a person/theme of national importance (e.g., Teachers’ Day on 5 September, honouring Dr. Sarvepalli Radhakrishnan). National days often have statutory or gazetted status.

Term: International Day
A day proclaimed by the United Nations General Assembly (UNGA) or specialised UN agencies (UNESCO, WHO, FAO, etc.) to raise awareness about a global issue, promote collective action, or celebrate a shared heritage. Examples include World Environment Day (5 June) and International Day for the Preservation of the Ozone Layer (16 September). The UN designates days by resolution; member states are encouraged but not required to observe them.

Term: World Day
Often used interchangeably with “International Day”. Some bodies, like the World Health Organization, use “World” in the name (e.g., World Health Day, 7 April). These days are also UN‑linked.

Term: Observance
A broad term that includes any date (day, week, year, decade) set aside for a cause, event, or personality. Observances can be at the national, regional, or global level. The UN also proclaims “International Years” (e.g., International Year of Millets, 2023) and “International Decades”.

Term: Anniversary Year
A year marking a multiple of ten or a century from a milestone birth or event. For example, Satyajit Ray’s 101st birth anniversary in 2022 (tested in WBCS 2022). The examiner may ask: “The 100th birth anniversary of which leader was celebrated in 20XX?”.

Term: UNGA Resolution
A formal decision of the United Nations General Assembly. Many UN‑designated days originate from a resolution (e.g., UNGA Resolution 57/278 established World Day for Safety and Health at Work). In higher‑difficulty questions, the examiner might reference the resolution number.

Term: Designation Authority
The body that officially creates the observance. For national days, it is the Government of India (Ministry of Culture or Home Affairs). For international days, it is generally the UNGA or a specialised agency (e.g., WHO created World Malaria Day). At the WBCS level, you are expected to know the authority for the most prominent observances.

How observances are created – a simplified process:

1. A proposal is tabled by one or more member states or by a UN agency.
2. The UNGA discusses and votes on the resolution.
3. If adopted, the day is formally added to the UN calendar of observances.
4. The first observance usually occurs the following year.

For example, International Day of the Tropics (26 June) was established by UNGA Resolution 70/267 in 2016, following a proposal by the State of the Tropics report. The day highlights the challenges and opportunities of the tropical regions.

Why dates matter in WBCS:

• Direct recall: “When is International Customs Day observed?” (25 January) – tested in 2023.
• Context linkage: “World Soil Day is celebrated on 5th December by which organisation?” (FAO) – tested in 2018.
• Anniversary calculations: “Satyajit Ray’s birth anniversary in 2022 was the 101st.” (Born 1921; 2022–1921+1 = 101) – tested in 2022.
• Matching/pairing: The examiner may ask to match a list of days with their dates or with the organisations that founded them.

Now that the foundation is clear, we will explore each major category of observances in deep‑dive sections.

International Days – UN and Specialised Agencies

Understanding the UN Calendar of Observances

The United Nations maintains a comprehensive calendar of international days, weeks, years, and decades. Every year, new days may be added. For WBCS, the most frequently tested UN days are those that are not too obscure but still require specific recall. The nine PYQs show four UN‑linked questions: Ozone Day (16 September), International Day of the Tropics (26 June), World Soil Day (5 December), and International Customs Day (25 January). Notice that the last one is not strictly a UN day but is observed by the World Customs Organization (WCO), an intergovernmental body. The WBCS examiner sometimes includes days from non‑UN bodies.

Key insight: Do not assume a “World” or “International” day is always UN‑designated. For example, International Customs Day is a WCO initiative, and World Red Cross Day (8 May) is from the International Red Cross Movement. However, many such days have been later endorsed by the UN.

Why 16 September for Ozone Day?
The date commemorates the signing of the Montreal Protocol on Substances that Deplete the Ozone Layer on 16 September 1987. The UN General Assembly proclaimed this day in 1994 (Resolution 49/114). The choice of date directly links to the landmark environmental treaty.

Why 26 June for International Day of the Tropics?
This day was first observed in 2017. It marks the launch of the first State of the Tropics Report on 26 June 2014. The date is symbolic of the region’s biodiversity and the need for sustainable development.

Why 5 December for World Soil Day?
5 December is the birthday of King Bhumibol Adulyadej of Thailand, who was a strong advocate for soil conservation. The FAO officially established World Soil Day in 2013, and the UN General Assembly endorsed it in 2014 (Resolution 68/232). The date reminds us of the link between soil health and food security.

Why 25 January for International Customs Day?
The World Customs Organization (headquartered in Brussels) chose 25 January to mark the day in 1953 when the inaugural session of the Customs Co‑operation Council (now WCO) was held. The theme for 2023 was “Nurturing the next generation: promoting a culture of knowledge‑sharing and professional pride in customs”.

Comparison table of UN days that appeared in PYQs:

Memory aid: For UN days with fixed dates, visualise a timeline on the UN Palace in your mind. Or use the acronym SOD‑CI for Soil (5 Dec), Ozone (16 Sep), Day of Tropics (26 Jun), Customs (25 Jan), International (general). Not perfect, but we will dedicate a proper mnemonic section later.

Other UN Days Important for WBCS (not yet tested but syllabus‑aligned)

The syllabus explicitly mentions international affairs – summits, treaties, UN bodies. Many UN days are linked to major treaties or summits. For example:

• World Environment Day – 5 June (UNEP) – first observed 1974.
• World Health Day – 7 April (WHO) – founding of WHO in 1948.
• World Water Day – 22 March (UN‑Water).
• World Youth Skills Day – 15 July (UNGA) – relevant to government skill‑development schemes.
• International Day of Yoga – 21 June (UNGA Res 69/131) – proposed by India, first observed 2015.
• World Food Day – 16 October (FAO) – founding of FAO in 1945.
• United Nations Day – 24 October (UNGA) – entry into force of UN Charter (1945).

Trap: Do not confuse World Environment Day (5 June) with World Earth Day (22 April). Earth Day is not a UN observance but is celebrated globally since 1970. WBCS could ask: “Which day was established by the UNEP?” – answer: World Environment Day.

National Observances in India

Days Honouring Personalities

India celebrates several days in honour of national leaders, scientists, and cultural icons. Three such days appear in the PYQs: Teachers’ Day (5 September, honouring Dr. Sarvepalli Radhakrishnan), and indirectly Satyajit Ray’s birth anniversary (2 May, tested as an anniversary calculation). Other key ones:

• National Youth Day – 12 January (birthday of Swami Vivekananda).
• National Science Day – 28 February (discovery of Raman Effect by Sir C.V. Raman, 1928).
• National Mathematics Day – 22 December (birthday of Srinivasa Ramanujan).
• National Sports Day – 29 August (birthday of hockey legend Major Dhyan Chand).
• National Farmers’ Day (Kisan Diwas) – 23 December (birthday of former PM Chaudhary Charan Singh).
• National Education Day – 11 November (birthday of Maulana Abul Kalam Azad).
• National Memorial Day for Martyrs – 30 January (Mahatma Gandhi’s martyrdom).

Why 5 September for Teachers’ Day? Dr. Sarvepalli Radhakrishnan, a philosopher and India’s first Vice‑President and second President, was born on 5 September 1888. When his students wanted to celebrate his birthday, he suggested that the day be dedicated to all teachers. Thus, since 1962, 5 September is Teachers’ Day.

Satyajit Ray’s birth anniversary: Ray was born on 2 May 1921 in Calcutta. In 2022, his birth anniversary fell on 2 May 2022. The number of years completed is 2022 – 1921 = 101. The PYQ in 2022 asked: “Satyajit Ray’s birth anniversary is being celebrated this year, 2022 – fill in the blank: ____.” The correct answer is 101st. This type of question tests simple arithmetic: current year minus birth year, then add 1 (because the anniversary counts the year of birth as the first). However, WBCS often uses “birth anniversary” literally: in 2022, it was the 101st birth anniversary because Ray was born in 1921. Always verify with the given year.

Comparison table of personality‑linked national days:

Government‑Scheme‑Linked Observances

The syllabus requires coverage of government schemes and programmes. Many flagship schemes have a designated day or week of celebration:

• POSHAN Maah (National Nutrition Month) – September.
• Swachhata Hi Seva – often linked to Gandhi Jayanti (2 October).
• International Day for Disaster Reduction (13 October) – linked to India’s National Disaster Management Authority campaigns.
• World Hindi Day – 10 January (not a government scheme but promoted by Ministry of External Affairs).

These are often included in matching‑type questions where the day is paired with the scheme.

Defence and Security Observances

The syllabus explicitly mentions defence and security – exercises, acquisitions, border issues. Key dates:

• Indian Army Day – 15 January (when General K. M. Cariappa took over as first Indian Commander‑in‑Chief, 1949).
• Indian Navy Day – 4 December (Operation Trident during 1971 war).
• Indian Air Force Day – 8 October (founding of the IAF in 1932).
• Veterans Day (Ex‑Servicemen Day) – 14 January.
• National Border Security Day – not a fixed date; but WBCS can ask about “International Day of Peace” (21 September) or “United Nations Peacekeepers Day” (29 May).

Memory aid for defence days: Use the mnemonic ANDI – Army (15 Jan), Navy (4 Dec), Defence (general), IAF (8 Oct). The order is chronological: Jan, Oct, Dec.

Sports and Awards – Observances & Anniversaries

Sports Days

• National Sports Day – 29 August (Major Dhyan Chand’s birthday). On this day, the President of India confers the Rashtriya Khel Protsahan Puruskar, Arjuna Award, Dronacharya Award, Dhyan Chand Award, and Major Dhyan Chand Khel Ratna Award.
• International Day of Sport for Development and Peace – 6 April (UNGA recognised).
• World Athletics Day – 7 May (World Athletics).
• Olympic Day – 23 June (International Olympic Committee).

WBCS 2018 had a question on World Soil Day (FAO), which is not a sports day, but the pattern shows that sports‑related days may appear in the current affairs section. For example, India’s performance at the Olympics often leads to questions about Olympic Day.

Awards and Honours – Observance Days

• Nobel Prize Day – 10 December (anniversary of Alfred Nobel’s death). The prizes for Peace, Literature, Sciences are awarded on this date.
• Padma Awards – announced on 25 January every year (Republic Day eve).
• National Film Awards – announced on 3 May (sometimes).
• National Teacher’s Award – 5 September (Teachers’ Day).
• National Sports Awards – 29 August.

Trap: The Nobel Prize ceremony is on 10 December, but the announcement dates vary (October). WBCS has not tested this yet, but it is a natural candidate.

Worked Examples & Applications

We will now solve five of the seven usable PYQs using the exact format required. Each example shows the question, choices as the student saw them (not as letter options), a step‑by‑step walkthrough, the correct answer in prose, and a pedagogical takeaway.

Example 1 — WBCS 2017 (Ozone Day)

Question: The International Day for the Preservation of the Ozone Layer is observed on

Choices students saw:

• September 12
• September 14
• September 16
• September 20

Walkthrough:

1. What the question is testing: Recall of a UN‑designated environmental day. The key is to connect the day to the Montreal Protocol.
2. Why each wrong choice is wrong:
   • September 12 – No major environmental day; it is actually International Day for South‑South Cooperation (UN day).
   • September 14 – Not associated with ozone; it is World Atopic Eczema Day.
   • September 16 – Correct. The Montreal Protocol was signed on 16 September 1987. The UN proclaimed this day in 1994.
   • September 20 – Not an UN day; it is often associated with International Peace Day (21 Sept) or National Voter Awareness Day in India.
3. Why the correct choice is right: The Montreal Protocol is a landmark environmental treaty to protect the ozone layer. The date of its signing (16 Sept 1987) was chosen for the observance.

Correct answer: September 16

Takeaway: Always associate a UN day with its foundational treaty or event. For ozone, link Montreal Protocol → 16 Sept 1987.

Example 2 — WBCS 2020 (Tropics Day)

Question: International Day of the Tropics is observed every year on

Choices students saw:

• 23rd March
• 26th June
• 4th July
• 22nd September

Walkthrough:

1. What the question is testing: Awareness of a relatively recent UN day (first observed 2017). The date is tied to the first State of the Tropics Report.
2. Why each wrong choice is wrong:
   • 23rd March – World Meteorological Day (UN). Not tropics.
   • 26th June – Correct. Established by UNGA Resolution 70/267 in 2016; marks the launch of the State of the Tropics Report (2014).
   • 4th July – US Independence Day, not an international day.
   • 22nd September – World Car‑Free Day or Rose Day; no UN tropics designation.
3. Why the correct choice is right: The UNGA resolution explicitly set 26 June. The day highlights the 40+ nations in the tropics and their developmental challenges.

Correct answer: 26th June

Takeaway: Newer UN days (post‑2015) are increasingly common in WBCS. Keep a separate list of “UN days established in the last 10 years”.

Example 3 — WBCS 2023 (Customs Day)

Question: When is ‘International Customs Day 2023’ observed?

Choices students saw:

• January 25
• January 26
• January 27
• January 28

Walkthrough:

1. What the question is testing: Knowledge of a non‑UN but intergovernmental day – World Customs Organization (WCO) day.
2. Why each wrong choice is wrong:
   • January 25 – Correct. The WCO was founded on 25 Jan 1953.
   • January 26 – India’s Republic Day. A common distractor for Indian students.
   • January 27 – International Holocaust Remembrance Day (UN).
   • January 28 – Data Privacy Day.
3. Why the correct choice is right: The WCO’s first session was held on 25 Jan 1953. Each year the WCO announces a theme; in 2023 it was “Nurturing the next generation”.

Correct answer: January 25

Takeaway: Beware of Republic Day as a distractor. Always verify the authority – if the day is about “customs”, think of WCO, not UN.

Example 4 — WBCS 2020 (Teachers’ Day)

Question: Teachers' Day is observed every year in India on

Choices students saw:

• September, 5
• October, 2
• November, 6
• December, 25

Walkthrough:

1. What the question is testing: A stapled national day honouring Dr. Sarvepalli Radhakrishnan.
2. Why each wrong choice is wrong:
   • September, 5 – Correct. Dr. Radhakrishnan’s birthday.
   • October, 2 – Gandhi Jayanti (Mahatma Gandhi’s birthday). Known as International Day of Non‑Violence too. Not Teachers’ Day.
   • November, 6 – No major Indian observance on this date (World Disaster Reduction Day is 13 Oct, etc.).
   • December, 25 – Christmas Day and Good Governance Day (India). Not Teachers’ Day.
3. Why the correct choice is right: Since 1962, India has observed 5 September as Teachers’ Day. The date was chosen because Dr. Radhakrishnan requested that his birthday be celebrated as a day for teachers.

Correct answer: September, 5

Takeaway: Many national days are tied to the birthdays of leaders. Create a list of “Person birthdays that became national days”.

Example 5 — WBCS 2019 (War Orphans Day)

Question: Which date is marked as the World Day for War Orphans?

Choices students saw:

• January 3
• January 4
• January 5
• January 6

Walkthrough:

1. What the question is testing: Awareness of a humanitarian observance. This day is not widely known; it was likely in current affairs due to a specific campaign.
2. Why each wrong choice is wrong:
   • January 3 – No major war orphans day.
   • January 4 – World Braille Day.
   • January 5 – National Bird Day (US) or other minor observances.
   • January 6 – Correct. The World Day for War Orphans was first observed in 1987 (some sources say it was initiated by the French organisation SOS Enfants en Détresse). It is not a UN day but is observed globally.
3. Why the correct choice is right: The date 6 January is commemorated to focus on the plight of children orphaned by war. WBCS 2019 included this as a current‑affairs item (perhaps due to a UN report or NGO campaign that year).

Correct answer: January 6

Takeaway: Some days are obscure and appear only because of a news peg. Keep an eye on first‑week‑of‑January current affairs – several days cluster there (World Braille Day 4 Jan, War Orphans 6 Jan, etc.).

PYQ Trends & Patterns

Analysing the nine PYQs (seven usable, two skipped due to missing answer keys), we observe the following patterns:

Key takeaways from trends:

• Direct recall dominates. Seven out of seven tested a specific date.
• Obscure days appear. War Orphans Day (6 Jan) and Customs Day (25 Jan) are not in every “Important Days” list. You need to supplement standard lists with recent current affairs.
• Anniversary calculation appears once. Expect it to recur – e.g., “In 2024, which year is the birth anniversary of Rabindranath Tagore (born 1861)?” (163rd).
• Distractors are clever but predictable. For UN days, distractors are often other UN days around the same month. For national days, distractors are other well‑known national days.
• No matching or chronological ordering has been asked yet – but that could change. The syllabus allows it.

Difficulty trajectory: The questions are consistently moderate. There has been no exceptionally hard question that requires memorising a resolution number or a founding year. However, as competition increases, the examiner may move from simple date‑day recall to linking the day with its founding year or organisation. For instance, instead of “When is World Soil Day?”, they could ask “World Soil Day is celebrated on 5th December by which organisation?” – already tested in 2018.

What Else Could Be Asked

Based on the PYQ patterns and the official syllabus scope, the following five‑to‑eight concrete question angles are highly probable in future WBCS exams. All are anchored in the tested concepts above.

Common Mistakes & Traps

• Confusing World Soil Day (5 Dec) with World Environment Day (5 June). Both are UN days, but one is in December (FAO) and the other in June (UNEP). Remember: Soil – S in December (Snow/Soil), Environment – June (summer greenery).
• Thinking Teachers’ Day is 5 September only in India. World Teachers’ Day by UNESCO is 5 October. The PYQ clearly asked for India’s Teachers’ Day (5 Sept). The distractor “World Teachers’ Day” does not appear, but the examiner could ask: “India’s Teachers’ Day is on 5 Sept. Which day is globally celebrated as World Teachers’ Day?” (5 Oct).
• Miscalculating anniversaries. Satyajit Ray born 1921. In 2022, it was the 101st anniversary (2022 – 1921 = 101). Some students might subtract without adding 1 if the birth year is included. However, the WBCS answer key uses the simple subtraction (age he would have turned in that year). Always do: n = current year – birth year.
• Mixing up similar‑sounding observances. “International Day for the Preservation of the Ozone Layer” and “World Environment Day” are both about environmental protection. Ozone Day is 16 Sep; Environment Day is 5 Jun.
• Ignoring non‑UN days. International Customs Day (25 Jan) is not a UN day but still appeared. Similarly, World Day for War Orphans (6 Jan) is not officially UN. The examiner occasionally includes days from other intergovernmental or non‑governmental organisations. Keep watch for days observed by WHO, FAO, UNESCO, WCO, etc.
• Assuming a date is fixed when it is not. Some observances have a floating date (e.g., the second Sunday of May for Mothers’ Day). WBCS rarely tests these, but be aware – if the question says “observed on the first Monday of October” it is likely World Habitat Day.

Memory Aids & Mnemonics

Mnemonic 1: “SOD‑CI” for four PYQ‑tested UN days

• S – Soil Day (5 December)
• O – Ozone Day (16 September)
• D – Day of Tropics (26 June)
• C – Customs Day (25 January)
• I – International (general category)

Say “SOD‑CI” like a chemical compound. Then remember the exact dates by creating a chain:
S: 5 (fingers) December (last month)
O: 16 (sweet sixteen) September (9th month)
D: 26 (double six) June (6th month)
C: 25 (quarter) January (1st month)

Worked example: If the question is “International Day of the Tropics”, the ‘D’ in SOD‑CI stands for Day of Tropics – so 26 June.

Mnemonic 2: “PT‑5” for Indian personality‑linked days

P – Personalities: Radhakrishnan (Teachers’ Day), Vivekananda (Youth Day), Raman (Science Day), Ramanujan (Maths Day), Dhyan Chand (Sports Day). All have dates in the 2nd half of the year except Vivekananda (12 Jan). But the mnemonic “PT‑5” is a positioning trick:

• P – President: Radhakrishnan (5 Sep)
• T – Teachers: same day
• 5 – 5 refers to the day of September, but also the total number.

Actually, a better mnemonic is a timeline:

January – Vivekananda (12)
February – Science Day (28)
August – Sports Day (29)
September – Teachers’ Day (5)
December – Mathematics Day (22)

Call it “JFSD” – Jan (Vivek), Feb (Science), Aug (Sports), Sep (Teachers), Dec (Maths). That covers five key dates.

Worked example: If asked “National Mathematics Day is celebrated on which date?”, recall the last month in JFSD: December, and the day is 22 (birthday of Ramanujan).

Quick Revision

Introduction

• This subtopic covers national/international days, anniversaries, and award-linked observances.
• 9 PYQs available, mostly direct recall of dates.
• WBCS tests UN days, national personality days, and non‑UN intergovernmental days.

Core Concepts & Foundations

• National Day = designated by government, often honouring a personality or event.
• International Day = designated by UNGA or UN specialised agencies.
• World Day = interchangeable with International Day, sometimes from WHO, FAO.
• Anniversary year = current year – birth year (for birth anniversaries).
• Designation Authority matters: FAO for World Soil Day, WCO for Customs Day.

International Days (UN & Others)

• Ozone Day : 16 Sep (Montreal Protocol)
• Tropics Day : 26 Jun (State of the Tropics Report)
• Soil Day : 5 Dec (FAO, King Bhumibol’s birthday)
• Customs Day : 25 Jan (WCO)
• Other key UN days: Environment (5 Jun), Health (7 Apr), Water (22 Mar), Yoga (21 Jun), Food (16 Oct).

National Observances in India

• Teachers’ Day : 5 Sep (Dr. Radhakrishnan)
• Youth Day : 12 Jan (Swami Vivekananda)
• Science Day : 28 Feb (Raman Effect)
• Mathematics Day : 22 Dec (Ramanujan)
• Sports Day : 29 Aug (Major Dhyan Chand)

Defence & Sports Days

• Army Day : 15 Jan
• Navy Day : 4 Dec
• Air Force Day : 8 Oct
• Sports Day : 29 Aug
• Olympic Day : 23 Jun

Worked Examples & PYQ Trends

• Direct recall dominates; distractors are often adjacent dates or other UN days.
• Anniversary calculation uses simple subtraction (current year – birth year).
• Non‑UN days appear occasionally (War Orphans, Customs).

What Else Could Be Asked

• Likely questions: matching UN days with dates, depth on first‑observance years, other FAO/WHO days, personality‑based centenaries.

Common Mistakes

• Confusing 5 Sep (India) vs 5 Oct (World)
• Misreading “Ozone Day” as “Environment Day”
• Forgetting year arithmetic (+1 vs not)
• Overlooking non‑UN intergovernmental days.

Memory Aids

• SOD‑CI: Soil (5 Dec), Ozone (16 Sep), Day of Tropics (26 Jun), Customs (25 Jan)
• JFSD timeline: Jan (Vivek 12), Feb (Science 28), Aug (Sports 29), Sep (Teachers 5), Dec (Maths 22)

Keep this chapter as your ready‑reckoner for all dates, days, and observances. Revise the mnemonics the night before the exam, and always read the morning newspaper with a highlighter for any new UN day or anniversary announced during the current year.