The first <a href="https://en.wikipedia.org/wiki/World_Oceans_Day" id="mwATA" rel="mw:WikiLink" title="World Oceans Day">World Oceans Day</a> is celebrated, coinciding with the <a href="https://en.wikipedia.org/wiki/Earth_Summit" id="mwATE" rel="mw:WikiLink" title="Earth Summit">Earth Summit</a> held in <a href="https://en.wikipedia.org/wiki/Rio_de_Janeiro" id="mwATI" rel="mw:WikiLink" title="Rio de Janeiro">Rio de Janeiro</a>, Brazil.