In 1985 the United Nations designated the first Monday of October every year as World Habitat Day. The idea is to reflect on the state of our towns and cities and the basic right of all to adequate shelter. It is also intended to remind the world of its collective responsibility for the future of the human habitat.
In 2016, the theme for World Habitat Day was "Housing at the Centre", where the campaign aimed to raise awareness about the need for affordable housing for all in urban areas, towns and cities.
The theme for 2017 has not yet been announced.
More information about World Habitat Day can be found on the UN's website.