On National Hippo Day 2023, promote the preservation and support of hippos. The main reason for killing these mammals is for their flesh. To understand hippos' beauty beyond their outward appearance, spend some time reading books and articles about them. Get outside and express some love to the hippos for the greatest way to spend the day. Happy Hippo Day To all Of us.Every year on February 15, World Hippo Day offers a unique opportunity to honour the third-largest animal in the world.