International Mermaid Day is observed every year on March 29. It’s for lovers of the fabled creature that’s appeared in literature, mythology, music, films, and pop culture for a long time. It’s the day to let one’s imagination run wild and indulge one’s fascination with this aquatic creature. Is it true that they exist, or is it a work of fiction? Whatever the solution, the ocean’s depths are filled with inexhaustible mysteries — it is simply the big unknown. It’s now time to learn about their ancient origins, history, and cultural significance around the world.