Important Days & Dates Mixed Quiz: Set 8

UNESCO proclaimed the day in 1999 and it has been observed since 2000, to promote linguistic diversity and mother-tongue education; the date recalls the language movement of 1952 in what is now Bangladesh.

National Unity Day, or Rashtriya Ekta Diwas, is observed on 31 October, the birth anniversary of Sardar Patel, who was born in 1875 at Nadiad, Gujarat.

On the night of 4 December 1971 the Indian Navy attacked Karachi harbour with missile boats, sinking enemy vessels and setting the oil tanks ablaze without losing a ship.

He was born on 12 January 1863, and the Government of India declared his birthday National Youth Day so that his call to the young would be placed before students each year.

World Environment Day marks the opening of the United Nations Conference on the Human Environment held at Stockholm in 1972, and it has been observed since 1974 under the lead of the United Nations Environment Programme, with a fresh theme and a host country each year.

On this date in 1945 the Charter of the United Nations came into force, after the required majority of signatory states had ratified it, and the General Assembly called upon members to observe the anniversary from 1948.

Swami Vivekananda was born on 12 January 1863 at Kolkata, and the Government of India declared his birthday National Youth Day in 1984, first observed in 1985, because his writings and his address at the Parliament of Religions at Chicago in 1893 are held up as a model for young…

On the night of 2 and 3 December 1984 methyl isocyanate gas leaked from a pesticide plant in Bhopal and killed thousands of people, in what remains the worst industrial disaster in India.

The lead body — WHO for the health days, UNESCO for education and language, the FAO for food, UNEP for the environment, or a United Nations office where the General Assembly named no agency — publishes the theme, the campaign material and the programme for the year.

Hiroshima Day is observed on 6 August, the date in 1945 on which the first atomic bomb used in war was dropped on the Japanese city of Hiroshima.

He was born on 31 October 1875, and as the first Deputy Prime Minister and Home Minister he brought the princely states into the Indian Union, which earned him the name Iron Man of India.

The amendment of 1992 gave panchayati raj institutions constitutional standing by adding Part IX and the Eleventh Schedule, and it took effect on 24 April 1993, which is why that date was chosen for the observance.

The constitution of the World Health Organization took effect on 7 April 1948, and the anniversary of that day has been kept as World Health Day since 1950, with a theme chosen by the organisation; its headquarters are at Geneva in Switzerland.

The day falls on the birth anniversary of Karl Landsteiner, whose discovery of the blood groups made safe transfusion possible and won him the Nobel Prize in Physiology or Medicine.

Dr Radhakrishnan, philosopher, professor and the second President of India, was born on 5 September 1888. When students wished to celebrate his birthday in 1962, he suggested that the day be kept for teachers instead, and it has been Teachers' Day ever since.

The day, formally the International Day for the Preservation of the Ozone Layer, marks the signing of the Montreal Protocol on 16 September 1987, the agreement under which countries agreed to stop using chlorofluorocarbons and other substances that thin the ozone layer.

He was born on 23 December 1902, served as Prime Minister of India, and worked all his life on the problems of land holdings and of the peasantry, which is why his birthday is kept as Kisan Diwas.

The Convention on Wetlands was signed on 2 February 1971 in the Iranian city of Ramsar on the shore of the Caspian Sea, and the wetlands listed under it are still called Ramsar sites; the day has been observed on this date since 1997.

Jawaharlal Nehru, the first Prime Minister of India, was born on 14 November 1889, and because of his affection for children, who called him Chacha Nehru, the date was adopted as Children's Day or Bal Diwas.

The day marks the signing of the Montreal Protocol on Substances that Deplete the Ozone Layer on 16 September 1987, an agreement to phase out chlorofluorocarbons and other ozone destroying chemicals, and it is often called the most successful environmental treaty.