October 20, 2025
  • It is celebrated annually on July 26th.
  • This International Day was adopted by the General Conference of the UN Educational, Scientific and Cultural Organization (UNESCO) in 2015.
  • The day commemorates the Greenpeace activist Hayhow Daniel Nonoto.
  • On July 26, 1998, the activist died of a heart attack while protesting for re-establishment of mangrove wetlands in Muisne, Ecuador.
  • It aims to raise awareness of the importance of mangrove ecosystems as “a unique, special and vulnerable ecosystem” and to promote solutions for their sustainable management, conservation and uses.
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