Important Days & Dates Quiz: Health and Environment Days

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.

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 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.

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.

World AIDS Day has been observed on the first of December since 1988 and was the first global health day of its kind, its symbol being the red ribbon; the theme changes every year and the day is used to press for testing, treatment and an end to stigma.

India proposed the day at the United Nations General Assembly, which adopted the resolution in December 2014, and the first observance was held in 2015; the date was chosen because 21 June is the summer solstice, the longest day of the year in the northern hemisphere.

World Water Day was recommended by the Earth Summit held at Rio de Janeiro in 1992 and has been observed since 1993 to draw attention to fresh water, its scarcity and the target of water and sanitation for all.

The World Health Organization began this observance in 1988 to draw attention to the health harm caused by tobacco in every form and to the industry's marketing, and each year it carries a theme, often aimed at young people.

Florence Nightingale was born on 12 May 1820 and became famous for organising nursing care for wounded soldiers in the Crimean War, where her rounds at night earned her the name the Lady with the Lamp; she later founded the first professional school of nursing, and the highest international honour…

The day falls on the birth anniversary of Karl Landsteiner, born on 14 June 1868, who classified human blood into the groups A, B and O and thus made safe transfusion possible; he received the Nobel Prize in Physiology or Medicine for this work.

International Tiger Day was agreed at the tiger summit held at Saint Petersburg in Russia in 2010, where the countries that still have wild tigers pledged to work towards doubling their numbers, and it has been observed on this date since then.

Bidhan Chandra Roy was born on 1 July 1882 and died on the same date in 1962, and since both fall on one day India keeps 1 July as National Doctors' Day; he was a distinguished physician, served as Chief Minister of West Bengal and was awarded the Bharat Ratna.