Otter Day 2025. Celebrate the charm and ecological importance of otters on world otter day, and learn how to safeguard their future. Every year, on the last wednesday of may, conservationists celebrate world otter day, established by the international otter survival fund (iosf).
In 2025 world otter day is on may 28th (wednesday). World otter day, or international otter awareness day, is organized by the international otter survival fund every last wednesday of may.