59. Which observance falls on 1 December each year?
[OSSC CGL — 12 Oct 2022, Shift 1]
- (A) International Yoga Day
- (B) World AIDS Day
- (C) Nagasaki Day
- (D) World Environment Day
Answer: (B) World AIDS Day
Explanation: World AIDS Day is marked every 1 December and has been observed since 1988. It raises awareness of HIV, remembers those who have died and stresses testing, prevention, treatment and the importance of eliminating stigma.
58. World Environment Day is celebrated on which date?
[OSSC CGL — 11 Oct 2022, Shift 2]
- (A) 22 March
- (B) 2 February
- (C) 8 August
- (D) 5 June
Answer: (D) 5 June
Explanation: World Environment Day falls on 5 June, not the water, wetlands or other environmental observance dates. The United Nations established the day following its landmark 1972 Stockholm conference; yearly campaigns focus on urgent issues affecting the planet.
57. World TB Day is celebrated on which date?
[RRB Group D — 6 Sept 2022, Shift 1]
- (A) 2 March
- (B) 24 March
- (C) 12 March
- (D) 28 March
Answer: (B) 24 March
Explanation: World Tuberculosis Day is observed annually on 24 March. On this date in 1882, Robert Koch announced his discovery of the bacterium causing tuberculosis. The commemoration promotes diagnosis, treatment and global action against this infectious disease.
56. In which year was Mahatma Gandhi’s 150th birth anniversary celebrated on Gandhi Jayanti?
[RRB Group D — 26 Aug 2022, Shift 1]
- (A) 2018
- (B) 2019
- (C) 2020
- (D) 2021
Answer: (B) 2019
Explanation: Mahatma Gandhi was born on 2 October 1869. Adding 150 years gives 2019, when India observed the 150th anniversary of his birth. Gandhi Jayanti is a national holiday, and the date is also the International Day of Non-Violence.
55. On which date is World Water Day celebrated?
[RRB Group D — 25 Aug 2022, Shift 3]
- (A) 26 August
- (B) 15 August
- (C) 22 March
- (D) 8 March
Answer: (C) 22 March
Explanation: World Water Day is observed on 22 March. The United Nations launched the international observance in 1993, following recommendations made at the 1992 Earth Summit. It highlights freshwater access, pollution prevention and sustainable water management.
54. National Unity Day is celebrated on whose birth anniversary?
[RRB NTPC CBT-II, Level 2 — 13 Jun 2022, Shift 2]
- (A) B. R. Ambedkar
- (B) Indira Gandhi
- (C) Sardar Vallabhbhai Patel
- (D) Mother Teresa
Answer: (C) Sardar Vallabhbhai Patel
Explanation: National Unity Day, or Rashtriya Ekta Diwas, occurs on 31 October, Sardar Vallabhbhai Patel’s birth anniversary. Patel was instrumental in unifying India’s princely states after independence, which explains the association between his legacy and national integration.
53. When is World Ozone Day celebrated?
[UKPSC Preliminary Examination — 3 Apr 2022]
- (A) 25 December
- (B) 21 April
- (C) 16 September
- (D) 30 January
Answer: (C) 16 September
Explanation: World Ozone Day is the commonly used name for the International Day for the Preservation of the Ozone Layer. It is observed on 16 September to mark the 1987 Montreal Protocol on substances that damage atmospheric ozone.
52. On which date is World Tourism Day celebrated?
[MPTET — 10 Mar 2022, Shift 1]
- (A) 16 February
- (B) 27 September
- (C) 29 September
- (D) 27 October
Answer: (B) 27 September
Explanation: World Tourism Day is marked on 27 September. The date commemorates the 1970 adoption of the statutes of the World Tourism Organization. Its purpose is to highlight tourism’s economic, cultural and social importance and its potential for sustainable development.
51. On which date is World Population Day observed?
[DSSSB Junior Engineer Electrical — 16 Mar 2022]
- (A) 11 October
- (B) 11 July
- (C) 11 August
- (D) 11 September
Answer: (B) 11 July
Explanation: World Population Day is held every 11 July. Established by the UN Development Programme in 1989, it draws public attention to demographic changes, sustainable development, health, education and reproductive rights. The first formal observance occurred in 1990.
