World Hippo Day is observed worldwide every February 15 to celebrate the hippopotamus and promote its conservation due to its vulnerable status. The holiday likely originated from a conservation organization or an individual concerned about hippos. People celebrate by visiting hippo exhibits at local zoos, going on safaris, watching films featuring hippos, and sharing interesting facts about these animals. Conservation organizations, nature parks, and zoos support the observance, which highlights the hippo's unique characteristics, such as being the third largest land animal and its habitat in rivers and lakes across sub-Saharan Africa. The hippopotamus faces threats from habitat loss and poaching, with an estimated population of 115,000 to 130,000 individuals. Celebrants often use the hashtag #WorldHippoDay on social media to spread the word about the holiday.