Celebrated around the world by increasing numbers since its founding in 1992, June 8th was officially designated World Oceans Day by the United Nations in 2008. Here’s a description from the About page of http://worldoceansday.org
“On World Oceans Day people around the planet celebrate and honor the body of water which links us all, for what it provides humans and what it represents. Be a part of this growing global celebration!”
For more information see http://theoceanproject.org