International Mother Language Day (IMLD) is a worldwide annual observance held on 21 February to promote awareness of linguistic and cultural diversity and multilingualism. First announced by UNESCO on 17 November 1999, it was formally recognized by the United Nations General Assembly in its resolution establishing 2008 as the International Year of Languages.
World Day of Social Justice is a day recognizing the need to promote efforts to tackle issues such as poverty, exclusion and unemployment. Many organizations, including the UN and the International Labour Office, make statements on the importance of social justice for people. Many organizations also present plans for greater social justice by tackling poverty, social and economic exclusion and unemployment. The United Nations General Assembly has decided to observe 20 February annually, approved on 26 November 2007 and starting in 2009, as the World Day of Social Justice.
World Cancer Day is an international day marked on February 4 to raise awareness of cancer and to encourage its prevention, detection, and treatment. World Cancer Day was founded by the Union for International Cancer Control (UICC) to support the goals of the World Cancer Declaration, written in 2008. The primary goal of the World Cancer Day is to significantly reduce illness and death caused by cancer by 2020.