The dates the exam asks every year — national days (Republic, Science, Sports, Youth) and world days (Wetlands, Environment, Yoga, Population, Ozone, AIDS) — with the person or theme behind each, photos and real past questions.
'Important days' questions are pure recall: a day and its date, often with the person or theme behind it. This page lists the ones that actually appear — India's national days and the world/international days — with a hook for each so the date sticks (Sports Day = Dhyan Chand's birthday; Science Day = the Raman Effect; Yoga Day = 21 June, the longest day). Learn these and you bank several easy marks every exam.
28 Feb
National Science Day
C. V. Raman / Raman Effect
29 Aug
National Sports Day
Major Dhyan Chand's birthday
21 Jun
International Yoga Day
Since 2015
National days of India
The Indian days — and the person behind each.
Days named for people
Major Dhyan Chand, the 'Hockey Wizard', at the 1936 Olympics. National Sports Day is his birthday, 29 August.
World AIDS Day has been observed on 1 December every year since 1988.
QUICK CHECK
PYQ · SSC — World Population Day is observed on:
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Answer: B — 11 July
World Population Day is observed on 11 July every year.
QUICK CHECK
PYQ · SSC — According to the Ramsar Convention, when is World Wetlands Day observed?
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Answer: C — 2 February
World Wetlands Day is observed on 2 February, the date the Ramsar Convention was signed (1971).
QUICK CHECK
PYQ · SSC — World Ozone Day is celebrated every year on ___ September.
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Answer: B — 16
World Ozone Day (International Day for the Preservation of the Ozone Layer) is on 16 September.
QUICK CHECK
PYQ · SSC — Which date is observed as the International Day of Happiness?
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Answer: B — 20 March
The UN proclaimed 20 March as the International Day of Happiness in 2012.
QUICK CHECK
PYQ · SSC — When is International Olympic Day observed?
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Answer: D — 23 June
Olympic Day is observed on 23 June, marking the founding of the International Olympic Committee in 1894.
QUICK CHECK
PYQ · SSC — World Blood Donor Day is observed every year on:
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Answer: C — 14 June
World Blood Donor Day is on 14 June, the birth anniversary of Karl Landsteiner (who discovered blood groups).
QUICK CHECK
PYQ · SSC — On which date is the International Day for Biological Diversity celebrated?
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Answer: D — 22 May
The International Day for Biological Diversity is observed on 22 May.
COMMON TRAPS
Science Day = 28 Feb (Raman); Sports Day = 29 Aug (Dhyan Chand); Youth Day = 12 Jan (Vivekananda).
Teachers' Day = 5 Sep (Radhakrishnan); Children's Day = 14 Nov (Nehru). Don't swap.
Environment Day = 5 Jun; Yoga Day = 21 Jun; Ozone Day = 16 Sep; AIDS Day = 1 Dec.
Wetlands Day = 2 Feb (Ramsar); Water Day = 22 Mar; Earth Day = 22 Apr.
Gandhi Jayanti (2 Oct) is also the International Day of Non-Violence.
FLASHCARDS
Quick revision
National Science Day
28 February (C. V. Raman)
National Sports Day
29 August (Dhyan Chand)
World Environment Day
5 June
International Yoga Day
21 June
World Population Day
11 July
World AIDS Day
1 December
CHECK YOURSELF
Which pair is correct? (a) World Environment Day – 5 July (b) National Science Day – 28 February (c) World Population Day – 11 June (d) Yoga Day – 21 July
Show answer
(b) is correct. Environment Day is 5 June, Population Day is 11 July, and Yoga Day is 21 June.
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Frequently Asked Questions
When is National Science Day and why?
28 February, marking C. V. Raman's discovery of the Raman Effect in 1928.
When is National Sports Day and whose birthday is it?
29 August, the birthday of hockey legend Major Dhyan Chand.
When are Teachers' Day and Children's Day?
Teachers' Day is 5 September (Dr. S. Radhakrishnan) and Children's Day is 14 November (Jawaharlal Nehru).
When is National Youth Day?
12 January, the birth anniversary of Swami Vivekananda.
When is World Environment Day and World Water Day?
World Environment Day is 5 June and World Water Day is 22 March.
When is International Yoga Day?
21 June, observed since 2015 after a proposal by India at the UN.
When is World Wetlands Day?
2 February, the date the Ramsar Convention on Wetlands was signed in 1971.
When is World Ozone Day?
16 September — the International Day for the Preservation of the Ozone Layer.
When is World AIDS Day and Human Rights Day?
World AIDS Day is 1 December and Human Rights Day is 10 December.
Which day is both Gandhi Jayanti and an international day?
2 October — Gandhi Jayanti is also the International Day of Non-Violence.