In 1948, the WHO held the First World Health Assembly. The Assembly decided to celebrate 7 April of each year, with effect from 1950, as the World Health Day. The World Health Day is held to mark WHO’s founding, and is seen as an opportunity by the organisation to draw worldwide attention to a subject of major importance to global health each year. The WHO organises international, regional and local events on the Day related to a particular theme. World Health Day is acknowledged by various governments and non-governmental organisations with interests in public health issues, who also organise activities and highlight their support in media reports, such as the Global Health Council.
World Health Day is one of eight official global public health campaigns marked by WHO, along with World Tuberculosis Day, World Immunization Week, World Malaria Day, World No Tobacco Day, World Diabetes Day,World Blood Donor Day, World Hepatitis Day, and World AIDS Day.