First Monday of October (In 2021, it falls on 4 October): World Habitat DayWorld Habitat Day is observed on the first Monday of October month throughout the world. It was declared by the United Nations General Assembly in December 1985 and in 1986, the first time it was celebrated across the globe.On this with ,in the sea ,there are several even uncountable unknown names habitats are living .Maybe we don't know theirs biological scientific /botanical names but always we heard about them in national geographic channels or any in wonder worlds organism . We are really blessed to have it with us .But not having much awareness of their importance like what and how they will become useful in the matter for science .Anyhow ,let's gain some more knowledge about it and learn what's it all .