World Fish Migration Day
World Fish Migration Day is held on April 21. This event in the third decade of the month april is annual.
Similar holidays and events
UN Chinese Language Day on April 20 (United Nations);
Chemists Celebrate Earth Day in USA on April 22 (In 2003, the American Chemical Society joined in on April 22's festivities. Each year, ACS highlights one of four general topics and chooses a theme—this year it's "Our Earth: Handle With Care"—to focus the celebration and highlight how chemists can contribute to a greener world);
UN English Language Day on April 23 (United Nations);
UN Spanish Language Day on April 23 (United Nations);