Important Days & Dates Mixed Quiz: Set 6

As the first Deputy Prime Minister and Home Minister he brought the princely states into the Indian Union, which is why his birthday is kept as National Unity Day, with the Run for Unity held across the country.

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.

Born on 23 December 1902, he served as Prime Minister in 1979 and 1980 and is remembered above all as a champion of the peasantry, whose writings and land reform measures were built around the small farmer.

The Constituent Assembly adopted, enacted and gave to itself the Constitution on 26 November 1949, and the Government of India has observed the date as Constitution Day, or Samvidhan Divas, since 2015.

The second International Day of Yoga fell in 2016, the year after the first observance of 2015, and the theme tied yoga to the Sustainable Development Goals that the United Nations had adopted in 2015, with the main event held at Chandigarh.

On 14 September 1949 the Constituent Assembly decided that Hindi written in the Devanagari script would be an official language of the Union, a decision that later became Article 343 of the Constitution, and that date is kept every year as Hindi Diwas.

The Constitution took effect on 26 January 1950 and India became a sovereign republic. The date was chosen on purpose, because the Indian National Congress had declared Purna Swaraj, or complete independence, on 26 January 1930, and the founders wished to honour that pledge.

International Tiger Day, also called Global Tiger Day, is observed on 29 July every year to draw attention to the conservation of the tiger and of its habitat, and it is a date on which tiger range countries report on their efforts.

He led the missile programme, was a key figure in the nuclear tests of 1998, served as the eleventh President of India and was given the Bharat Ratna in 1997.

The United Nations General Assembly designated the day after the Conference on the Human Environment held at Stockholm in 1972, and it has been observed since 1973.

Pakistan's eastern command surrendered to the Indian Army and the Mukti Bahini at Dhaka on 16 December 1971, ending a war of thirteen days and leading to the creation of Bangladesh, which observes the same date as its Victory Day.

The Government of India gave the day the name Parakram Diwas, meaning the day of valour, in recognition of his leadership of the Indian National Army and his call for complete independence.

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.

The day is observed across the country and is a public holiday in many states.

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.

Born on 26 November 1921, Kurien is called the Father of the White Revolution in India. He built the Amul cooperative at Anand in Gujarat and led Operation Flood, the programme that made India the largest producer of milk in the world, and the day has been observed since 2014.

The Press Council of India, the statutory watchdog of the press set up to preserve its freedom and to maintain its standards, began functioning on 16 November 1966, and the date is observed as National Press Day in recognition of a free and responsible press.

The General Assembly established the day after the Stockholm Conference on the Human Environment of 1972, and it has been observed since 1974 under the lead of the UN Environment Programme, with a different country hosting the main event each year.

Sir C. V. Raman announced his discovery of the scattering of light, now called the Raman effect, on 28 February 1928, and it won him the Nobel Prize in Physics in 1930, the first for an Indian in the sciences.

The General Assembly adopted it on 10 December 1948 at Paris, and the observance of the anniversary began in 1950; the Declaration has thirty articles and is the most translated document in the world.