The World Day Against Child Labour is an International Labour Organisation (ILO) sanctioned holiday first lunched in 2002 aiming to raise awareness and activism to prevent child labour. It was spurred by ratifications of ILO Convention on the minimum age of employment and on the worst forms of child labour.
The World Day Against Child Labour, which is held every year on June 12, is intended to foster worldwide movement against child labour in any of its forms.
Source : Wikipedia
World Book Day or World Book and Copyright Day is a yearly event on April 23rd, organized by the United Nations Educational, Scientific and Cultural Organization (UNESCO), to promote reading, publishing and copyright. World Book Day was first celebrated for the first time on 23rd April 1995.
The International Day for Monuments and Sites (World Heritage Day) is held on 18 April each year around the world with different types of activities, including visits to monuments and heritage sites, conferences, round table and newspaper articles. The aim is to promote awareness about the diversity of cultural heritage of human, their vulnerability and the efforts required for their protection and conservation.
The World Health Day is a global awareness day celebrated every year on the 7th of April, under the sponsorship of the World Health Organization. The World Health Day is held to mark WHOs funding, and is seen as an opportunity by the organization to draw worldwide attention to a subject of major importance to global health.