World Population Day was established by the Governing Council of the United Nations Development Programme in 1989 as a way to focus attention on the urgency and importance of population issues. It was an outgrowth of the interest generated by the Day of Five Billion, which was observed on 11 July 1987.
Each year UNFPA selects a different theme to rally around. People around the world observe World Population Day in different ways. Many UNFPA Country Offices and other institutions mark the day with celebrations, poster or essay contests, sports events concerts or other activities to bring attention to population issues.