Important Days & Dates — National (India)

Why This Chapter Matters

Every SSC CGL, CHSL, MTS, CPO and RRB NTPC paper carries at least one or two questions straight off this list, and Static GK sections in banking exams lean on it even harder. It is one of the cheapest scoring zones in the whole syllabus: no reasoning needed, no calculation, just a date sitting next to a name. Miss it and you have thrown away a free mark.

The chapter runs month by month, January through December, because that is exactly how the exam question is framed — "Which of the following is observed on 21 May?" — and that is how your recall needs to work too. The single biggest mistake aspirants make here is mixing up national days with international/UN days that happen to fall close together or share a similar name. Teachers' Day (5 September, national, for Dr. Radhakrishnan) gets confused with World Teachers' Day (5 October, UN). National Science Day (28 February) gets confused with National Technology Day (11 May) — both science-flavoured, both in the first half of the year, both testing different men (C.V. Raman vs the Pokhran team). We flag every one of these collisions as an Exam trap so you stop losing marks to them.

How This Table Is Built

Each entry below gives you the date, the official name, and the one fact behind it, because the exam rarely asks just "what date" — it often asks "why that date" (whose birthday, which event, which discovery). Read the reason once and the date sticks on its own; a birthday or an event is far easier to remember than a bare number.

Memory hook: Think of the year as a train with 12 stations. At each station something Indian happened — a birth, a martyrdom, a discovery, a war anniversary. You are not memorising 40 random dates; you are riding one train and noting who got on at each stop.

January — The Year Opens With Youth and Sacrifice

Date	Observance	Significance
9 January	Pravasi Bharatiya Divas	Marks the day in 1915 Mahatma Gandhi returned to India from South Africa; celebrates the Indian diaspora's contribution.
10 January	World Hindi Day	Commemorates the first World Hindi Conference (1975, Nagpur); promotes Hindi globally — not to be confused with Hindi Diwas (14 September), which is a purely domestic observance.
12 January	National Youth Day	Birth anniversary of Swami Vivekananda (1863); theme each year centres on youth empowerment.
15 January	Army Day	Marks the day in 1949 Field Marshal K.M. Cariappa became the first Indian Commander-in-Chief of the Indian Army, replacing the last British C-in-C.
23 January	Parakram Diwas	Birth anniversary of Netaji Subhas Chandra Bose (1897); "Parakram" means valour.
24 January	National Girl Child Day	Started in 2008 by the Ministry of Women and Child Development to spotlight the gender gap in survival, education and health.
25 January	National Voters' Day	Marks the founding day of the Election Commission of India in 1950; also National Tourism Day falls on the same date, a frequently tested pair.
30 January	Martyrs' Day (Shaheed Diwas)	Assassination anniversary of Mahatma Gandhi (1948); observed nationally with two minutes of silence at 11 a.m.

Exam trap: India has two "Martyrs' Days" and examiners love this. 30 January is for Gandhi's assassination. 23 March is for the hanging of Bhagat Singh, Rajguru and Sukhdev. If the question mentions "two minutes silence at 11 am," it is 30 January. If it mentions Lahore Conspiracy Case or the hanging, it is 23 March.

February — A Quiet Month, One Big Discovery

Date	Observance	Significance
28 February	National Science Day	Commemorates C.V. Raman's discovery of the Raman Effect on this date in 1928, which won him the Nobel Prize in Physics in 1930.

This is the only mandatory national entry in February, and it is a favourite. The Raman Effect describes how light scatters when it passes through a transparent medium, changing wavelength in a measurable way. Raman announced the discovery on 28 February 1928 in Kolkata; the Nobel came two years later, and he remains the first Asian to win a science Nobel while working entirely in India.

Exam trap: Do not swap C.V. Raman's discovery date with his Nobel Prize year. The day (28 February) is tied to the discovery, not the award ceremony.

March — Sacrifice, Security and Immunisation

Date	Observance	Significance
4 March	National Security Day	Marks the founding of the Central Industrial Security Force (CISF) in 1969; observed to raise awareness of security consciousness.
16 March	National Vaccination Day	Marks the day in 1995 India administered its first dose of the oral polio vaccine under the Pulse Polio Immunisation programme.
23 March	Shaheed Diwas	Hanging anniversary of Bhagat Singh, Rajguru and Sukhdev (1931) at Lahore Central Jail.

Exam trap: National Vaccination Day (16 March) is often confused with World Immunization Week (last week of April, a UN observance). Keep the domestic polio-drive origin in mind for the Indian one.

April — From the Constitution's Architect to Public Service

Date	Observance	Significance
5 April	National Maritime Day	Marks the maiden voyage of India's first shipping company vessel, the SS Loyalty, from Mumbai to London in 1919.
14 April	Ambedkar Jayanti	Birth anniversary of Dr. B.R. Ambedkar (1891), chief architect of the Indian Constitution; also called Bhim Jayanti.
21 April	National Civil Services Day	Marks Sardar Vallabhbhai Patel's 1947 address to probationary IAS officers calling the civil service the "steel frame" of India.

Exam trap: "Steel frame of India" is a phrase examiners like to pin on the wrong person. It comes from Sardar Patel's 21 April 1947 speech, not from Nehru or Ambedkar.

May — Labour, Technology and a Grim Anniversary

Date	Observance	Significance
1 May	Labour Day (May Day)	Marks the 1886 Chicago general strike for an eight-hour workday; India adopted the observance from 1923. Also the founding day of Maharashtra and Gujarat states in 1960.
11 May	National Technology Day	Commemorates Pokhran-II, India's second series of nuclear tests conducted on this date in 1998 under Operation Shakti.
21 May	Anti-Terrorism Day	Assassination anniversary of former Prime Minister Rajiv Gandhi (1991), killed in a suicide bombing at Sriperumbudur, Tamil Nadu.

Exam trap: National Technology Day is 11 May (Pokhran-II, 1998). Do not confuse it with National Science Day (28 February, C.V. Raman) — one is a nuclear-technology milestone, the other a physics discovery six decades earlier.

June — The One Month With No Standalone National Entry

June is dominated by International Yoga Day (21 June), which is a UN-recognised international observance even though the idea originated with India's push at the United Nations in 2014. Because it is formally a UN Day, it belongs in the International Days chapter rather than here — but remember it when an exam paper lists it alongside national days, since setters frequently mix the two lists in a single question to test exactly this distinction.

July — Doctors and a War Remembered

Date	Observance	Significance
1 July	National Doctors' Day	Birth and death anniversary of Dr. Bidhan Chandra Roy (1882–1962), physician and second Chief Minister of West Bengal, recipient of the Bharat Ratna in 1961.
26 July	Kargil Vijay Diwas	Marks India's victory over Pakistani intrusion in the Kargil War (1999), when Indian forces recaptured the high-altitude posts in Dras-Kargil sector under Operation Vijay.

The Kargil War is a gift to memorise because the date, the operation name and the outcome all sit together. Picture the "Vijay" in both the operation's name and the day's name — Operation Vijay led to Vijay Diwas. That link alone answers half the questions asked on this topic.

August — The Busiest Month on the Calendar

Date	Observance	Significance
7 August	National Handloom Day	Marks the launch of the Swadeshi Movement in 1905 as a protest against the Partition of Bengal; celebrates India's handloom weavers.
15 August	Independence Day	India became free of British rule in 1947; Prime Minister hoists the national flag at the Red Fort in Delhi.
20 August	Sadbhavana Diwas	Birth anniversary of former Prime Minister Rajiv Gandhi (1944); "Sadbhavana" means harmony/goodwill.
29 August	National Sports Day	Birth anniversary of hockey legend Major Dhyan Chand (1905), three-time Olympic gold medallist; the Khel Ratna award was renamed the Major Dhyan Chand Khel Ratna in his honour in 2021.

Exam trap: Two Rajiv Gandhi dates exist and setters exploit the gap. 21 May (his death) is Anti-Terrorism Day. 20 August (his birth) is Sadbhavana Diwas. If the option mentions "harmony" or "goodwill," it is the birthday one.

September — Teachers, Language and Engineering

Date	Observance	Significance
5 September	Teachers' Day	Birth anniversary of Dr. Sarvepalli Radhakrishnan (1888), philosopher and second President of India, who asked that his birthday be observed honouring all teachers rather than himself.
14 September	Hindi Diwas	Marks the day in 1949 the Constituent Assembly adopted Hindi in Devanagari script as one of the official languages of India.
15 September	Engineers' Day	Birth anniversary of Sir M. Visvesvaraya (1861), engineer-statesman who designed the flood-protection system for Hyderabad and the automatic weir gates used at the Krishnarajasagar dam; Bharat Ratna, 1955.

Exam trap: Teachers' Day (5 September, national) versus World Teachers' Day (5 October, UNESCO) is the single most commonly confused pair in this entire chapter. Same profession, same word, one month apart. Anchor "5-9" to Radhakrishnan and you will never slip.

October — From Non-Violence to National Unity

Date	Observance	Significance
2 October	Gandhi Jayanti	Birth anniversary of Mahatma Gandhi (1869); also observed globally as the International Day of Non-Violence since 2007.
8 October	Indian Air Force Day	Marks the formal establishment of the Indian Air Force in 1932 under British India, then called the Royal Indian Air Force.
15 October	World Students' Day	Birth anniversary of Dr. A.P.J. Abdul Kalam (1931), aerospace scientist and 11th President of India, called the Missile Man of India; the UN declared this day in his honour in 2010.
31 October	National Unity Day (Rashtriya Ekta Diwas)	Birth anniversary of Sardar Vallabhbhai Patel (1875), the "Iron Man of India" who integrated over 560 princely states into the Union; also the assassination anniversary of Prime Minister Indira Gandhi (1984).

Gandhi Jayanti carries double weight in exams because it is both a national holiday and one of the very few Indian dates that the United Nations itself formally adopted. Keep both labels in your head: national holiday at home, International Day of Non-Violence abroad.

November — Children, and the Document That Runs the Country

Date	Observance	Significance
14 November	Children's Day	Birth anniversary of Jawaharlal Nehru (1889), India's first Prime Minister, fondly called "Chacha Nehru" by children.
26 November	Constitution Day (Samvidhan Diwas)	Marks the day in 1949 the Constituent Assembly formally adopted the Constitution of India; it came into force later, on 26 January 1950.

Exam trap: The Constitution was adopted on 26 November 1949 but came into force on 26 January 1950 — that gap of exactly two months is a classic fill-in-the-blank trap. Adoption gives you Constitution Day; enforcement gives you Republic Day.

December — Armed Forces, Numbers and Farmers

Date	Observance	Significance
4 December	Navy Day	Commemorates Operation Trident, the Indian Navy's decisive strike on Karachi harbour during the 1971 Indo-Pak War.
7 December	Armed Forces Flag Day	Raises public funds for the welfare of soldiers, ex-servicemen and their families through voluntary flag-badge contributions.
16 December	Vijay Diwas	Marks India's victory in the 1971 Indo-Pak War and the surrender of over 93,000 Pakistani troops, leading to the creation of Bangladesh.
22 December	National Mathematics Day	Birth anniversary of self-taught mathematical genius Srinivasa Ramanujan (1887), known for work on infinite series, continued fractions and number theory, much of it done without formal training.
23 December	Kisan Diwas (Farmers' Day)	Birth anniversary of Chaudhary Charan Singh (1902), former Prime Minister and farmer-rights advocate.

Exam trap: December has two "war victory" days close together — Navy Day (4 December, Operation Trident) and Vijay Diwas (16 December, final surrender). Both belong to the same 1971 war but mark different milestones: the naval strike versus the overall military surrender that created Bangladesh. A question naming "Operation Trident" always points to 4 December, never 16 December.

Republic Day — A Category of Its Own

26 January — Republic Day deserves separate emphasis because it is asked more often than any other date in this chapter. It marks the day in 1950 the Constitution of India came into force, replacing the Government of India Act, 1935, as the country's governing document, and transforming India from a dominion into a sovereign democratic republic. The date was deliberately chosen: 26 January had already been observed as Purna Swaraj Day since 1930, when the Indian National Congress declared complete independence as its goal at the Lahore session under Jawaharlal Nehru's presidency. Choosing the same date for the Constitution's enforcement was a way of completing that unfinished promise exactly 20 years later. The President of India unfurls the flag and takes the salute at the Republic Day parade in Delhi, unlike Independence Day, where the Prime Minister hoists the flag at the Red Fort — a distinction examiners test almost every year.

Memory hook: Independence Day, Prime Minister, Red Fort — three words starting with the same rhythm as "freedom." Republic Day, President, Rajpath/Kartavya Path — the President presides because Republic Day celebrates the country becoming self-governed under its own law, and the President is the constitutional head of that law.

Why the Dates Cluster the Way They Do

You will notice patterns once you stop treating this as 40 unrelated facts. Freedom-struggle martyrs cluster in January and March. Scientific milestones cluster in February, May and December. War anniversaries cluster in July and December because both the Kargil War (1999) and the 1971 war reached their climax in those months. Founders and architects of institutions — Ambedkar, Patel, Visvesvaraya — get their own days scattered through the year tied to their birthdays, which is why "whose birthday is this" is almost always the right first question to ask when you see an unfamiliar date in an MCQ.

Think of the national calendar the way a newsroom editor thinks of a year-long front page: certain kinds of stories get certain months. Once you see the pattern, a brand-new date you have never memorised becomes a guessable one, because you can ask "does this sound like a freedom-fighter's birthday, a scientific milestone, or a war anniversary" and narrow the answer choices before you even recall the exact fact.

Quick Revision — One-Line Facts

• 9 January — Pravasi Bharatiya Divas, Gandhi's 1915 return from South Africa.
• 12 January — National Youth Day, Swami Vivekananda's birthday.
• 15 January — Army Day, K.M. Cariappa became first Indian C-in-C in 1949.
• 23 January — Parakram Diwas, Netaji Subhas Chandra Bose's birthday.
• 25 January — National Voters' Day, Election Commission's founding day (1950).
• 26 January — Republic Day, Constitution came into force in 1950.
• 30 January — Martyrs' Day, Gandhi's assassination anniversary.
• 28 February — National Science Day, C.V. Raman discovered the Raman Effect in 1928.
• 4 March — National Security Day, marks CISF's founding (1969).
• 16 March — National Vaccination Day, India's first oral polio dose (1995).
• 23 March — Shaheed Diwas, Bhagat Singh, Rajguru and Sukhdev hanged in 1931.
• 5 April — National Maritime Day, SS Loyalty's maiden voyage (1919).
• 14 April — Ambedkar Jayanti, birth anniversary of the Constitution's chief architect.
• 21 April — National Civil Services Day, Patel's "steel frame" speech (1947).
• 1 May — Labour Day, also the founding day of Maharashtra and Gujarat (1960).
• 11 May — National Technology Day, Pokhran-II nuclear tests (1998).
• 21 May — Anti-Terrorism Day, Rajiv Gandhi's assassination anniversary.
• 1 July — National Doctors' Day, birth/death anniversary of Dr. B.C. Roy.
• 26 July — Kargil Vijay Diwas, victory in the 1999 Kargil War.
• 7 August — National Handloom Day, marks the 1905 Swadeshi Movement.
• 15 August — Independence Day, freedom from British rule in 1947.
• 20 August — Sadbhavana Diwas, Rajiv Gandhi's birth anniversary.
• 29 August — National Sports Day, Major Dhyan Chand's birthday.
• 5 September — Teachers' Day, Dr. Sarvepalli Radhakrishnan's birthday.
• 14 September — Hindi Diwas, Hindi adopted in Devanagari script in 1949.
• 15 September — Engineers' Day, Sir M. Visvesvaraya's birthday.
• 2 October — Gandhi Jayanti, also International Day of Non-Violence.
• 8 October — Indian Air Force Day, IAF established in 1932.
• 15 October — World Students' Day, Dr. A.P.J. Abdul Kalam's birthday.
• 31 October — National Unity Day, Sardar Vallabhbhai Patel's birthday.
• 14 November — Children's Day, Jawaharlal Nehru's birthday.
• 26 November — Constitution Day, Constitution adopted in 1949.
• 4 December — Navy Day, marks Operation Trident (1971).
• 7 December — Armed Forces Flag Day, funds welfare of soldiers.
• 16 December — Vijay Diwas, 1971 war victory, creation of Bangladesh.
• 22 December — National Mathematics Day, Srinivasa Ramanujan's birthday.
• 23 December — Kisan Diwas, Chaudhary Charan Singh's birthday.

Memory Tables

Table 1 — Birthday-Anchored National Days (Person → Date → Title)

Person	Date	Day Named
Swami Vivekananda	12 January	National Youth Day
Netaji Subhas Chandra Bose	23 January	Parakram Diwas
Dr. B.R. Ambedkar	14 April	Ambedkar Jayanti
Dr. Bidhan Chandra Roy	1 July	National Doctors' Day
Rajiv Gandhi	20 August	Sadbhavana Diwas
Major Dhyan Chand	29 August	National Sports Day
Dr. Sarvepalli Radhakrishnan	5 September	Teachers' Day
Sir M. Visvesvaraya	15 September	Engineers' Day
Mahatma Gandhi	2 October	Gandhi Jayanti
Dr. A.P.J. Abdul Kalam	15 October	World Students' Day
Sardar Vallabhbhai Patel	31 October	National Unity Day
Jawaharlal Nehru	14 November	Children's Day
Srinivasa Ramanujan	22 December	National Mathematics Day
Chaudhary Charan Singh	23 December	Kisan Diwas

Table 2 — Days Tied to a Defining Event Rather Than a Birthday

Date	Day	Event It Marks
15 January	Army Day	K.M. Cariappa becomes first Indian Army C-in-C (1949)
26 January	Republic Day	Constitution comes into force (1950)
28 February	National Science Day	Raman Effect discovered (1928)
16 March	National Vaccination Day	First oral polio dose administered (1995)
5 April	National Maritime Day	SS Loyalty's maiden voyage (1919)
11 May	National Technology Day	Pokhran-II nuclear tests (1998)
26 July	Kargil Vijay Diwas	Victory in Kargil War (1999)
15 August	Independence Day	Freedom from British rule (1947)
8 October	Indian Air Force Day	IAF established (1932)
26 November	Constitution Day	Constitution formally adopted (1949)
4 December	Navy Day	Operation Trident (1971)
16 December	Vijay Diwas	Surrender ending 1971 war (1971)

Table 3 — Commonly Confused National-vs-International Pairs

National Day (India)	Date	Often Confused With	Date
Teachers' Day	5 September	World Teachers' Day (UNESCO)	5 October
National Tourism Day	25 January	World Tourism Day (UNWTO)	27 September
National Vaccination Day	16 March	World Immunization Week (UN)	Last week of April
Martyrs' Day (Gandhi)	30 January	Shaheed Diwas (Bhagat Singh et al.)	23 March

Practice MCQs

Q1. National Science Day is celebrated on 28 February to mark the discovery of which phenomenon? (a) Photoelectric effect (b) Raman Effect (c) Doppler Effect (d) Compton Effect

Q2. Who was the first Indian Commander-in-Chief of the Indian Army, an event commemorated as Army Day on 15 January? (a) Sam Manekshaw (b) K.M. Cariappa (c) K.S. Thimayya (d) J.N. Chaudhuri

Q3. Constitution Day (Samvidhan Diwas) is observed on 26 November to mark which event? (a) Constitution came into force (b) Constituent Assembly first met (c) Constitution was formally adopted by the Constituent Assembly (d) India became a republic

Q4. Which day is observed as National Technology Day, commemorating the Pokhran-II nuclear tests? (a) 11 May (b) 28 February (c) 21 May (d) 15 August

Q5. Whose birth anniversary is observed as Teachers' Day in India? (a) Rabindranath Tagore (b) Dr. Sarvepalli Radhakrishnan (c) Maulana Abul Kalam Azad (d) Swami Vivekananda

Q6. National Unity Day (Rashtriya Ekta Diwas) on 31 October marks the birth anniversary of which leader? (a) Jawaharlal Nehru (b) Lal Bahadur Shastri (c) Sardar Vallabhbhai Patel (d) Rajendra Prasad

Q7. Kargil Vijay Diwas, observed on 26 July, commemorates India's victory in the Kargil War of which year? (a) 1971 (b) 1965 (c) 1999 (d) 2001

Q8. Which of these correctly pairs the date with the observance? (a) 5 April — National Maritime Day (b) 5 April — National Science Day (c) 5 April — National Technology Day (d) 5 April — National Handloom Day

Q9. National Sports Day, marked on 29 August, is the birth anniversary of which sportsperson? (a) Milkha Singh (b) Major Dhyan Chand (c) K.D. Jadhav (d) P.T. Usha

Q10. Which day is observed to remember the hanging of Bhagat Singh, Rajguru and Sukhdev? (a) 30 January (b) 23 March (c) 26 July (d) 15 August

Q11. Vijay Diwas on 16 December marks India's victory over Pakistan in 1971, leading to the creation of which country? (a) Nepal (b) Myanmar (c) Bangladesh (d) Sri Lanka

Q12. National Doctors' Day on 1 July is observed in honour of which physician-statesman? (a) Dr. Bidhan Chandra Roy (b) Dr. Rajendra Prasad (c) Dr. Zakir Husain (d) Dr. Homi Bhabha

Q13. Navy Day, observed on 4 December, commemorates which naval operation of the 1971 war? (a) Operation Cactus (b) Operation Trident (c) Operation Vijay (d) Operation Meghdoot

Q14. Republic Day (26 January) was deliberately chosen to coincide with which earlier historical event? (a) The Dandi March of 1930 (b) The Purna Swaraj declaration of 1930 (c) The Quit India Movement of 1942 (d) The formation of the Constituent Assembly in 1946

Q15. Who among the following delivered the "steel frame of India" address to civil service probationers on 21 April 1947, the date now observed as National Civil Services Day? (a) Jawaharlal Nehru (b) Sardar Vallabhbhai Patel (c) Dr. B.R. Ambedkar (d) C. Rajagopalachari

Answer Key

Q	Answer	Reason
Q1	(b)	C.V. Raman announced the Raman Effect on 28 February 1928, which later won him the 1930 Nobel Prize in Physics.
Q2	(b)	K.M. Cariappa became independent India's first Indian Commander-in-Chief on 15 January 1949, the origin of Army Day.
Q3	(c)	Constitution Day marks the Constituent Assembly's formal adoption of the Constitution on 26 November 1949; it came into force two months later, on 26 January 1950.
Q4	(a)	National Technology Day falls on 11 May, marking the Pokhran-II nuclear tests of 1998; don't confuse it with National Science Day (28 February).
Q5	(b)	Teachers' Day honours Dr. Sarvepalli Radhakrishnan's birthday; he asked that the day celebrate all teachers, not himself personally.
Q6	(c)	National Unity Day marks the birth anniversary of Sardar Vallabhbhai Patel, who integrated over 560 princely states into the Indian Union.
Q7	(c)	The Kargil War was fought and won in 1999, commemorated every 26 July as Kargil Vijay Diwas.
Q8	(a)	5 April is National Maritime Day, marking the SS Loyalty's 1919 maiden voyage from Mumbai to London.
Q9	(b)	National Sports Day marks the birthday of hockey legend Major Dhyan Chand, a three-time Olympic gold medallist.
Q10	(b)	23 March is Shaheed Diwas for Bhagat Singh, Rajguru and Sukhdev; 30 January is the separate Martyrs' Day for Gandhi's assassination.
Q11	(c)	India's decisive victory in the 1971 war led directly to the creation of Bangladesh from what was then East Pakistan.
Q12	(a)	Dr. Bidhan Chandra Roy, a physician and former Chief Minister of West Bengal, is honoured on his birth and death anniversary, 1 July.
Q13	(b)	Operation Trident, the Indian Navy's strike on Karachi harbour, is commemorated every 4 December as Navy Day.
Q14	(b)	26 January was chosen because the Indian National Congress had declared Purna Swaraj (complete independence) as its goal on this date in 1930.
Q15	(b)	Sardar Vallabhbhai Patel's 21 April 1947 speech to probationary civil servants, calling them the "steel frame" of India, is the origin of National Civil Services Day.