A fun observance on March 29 celebrating mythical mermaids and merfolk from folklore, literature, film, and pop culture.
Last updated February 26, 2026 · by the
Holiday Calendar Team
The Freeform TV network created International Mermaid Day in late 2017 to promote the premiere of their series Siren, which debuted on March 29, 2018. They marked it with a Hollywood mermaid museum and a donation to Heal the Bay ocean conservation group.
Get ready to dive into the magical world of mermaids on March 29, also known as Mermaid Day! This day celebrates these mythical creatures that have captured our imagination for centuries. The earliest stories of mermaids can be traced back to ancient Assyria and Greece, and they have appeared in various forms throughout history – from folklore to literature to pop culture. Whether you believe in their existence or not, there's no denying the enchanting allure of mermaids. So put on your fins and celebrate this day by embracing your inner mermaid or learning more about these legendary beings.
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WHY THIS DAY MATTERS
In many stories and legends, mermaids are portrayed as strong, independent women who defy societal norms and chart their own paths. On Mermaid Day, we can celebrate these powerful figures and remind ourselves that we too have the ability to control our own destinies.
Mermaids are often seen as creatures of myth and legend, making them the perfect subject to celebrate on this special day. With their enchanting beauty and mystical abilities, it's easy to see why we're so captivated by mermaids.
Many of us grew up dreaming of being a mermaid - swimming through the ocean, having underwater adventures, and living in a beautiful seashell palace. Mermaid Day is the perfect excuse to let go of adult responsibilities and indulge in some childlike wonder.
Unleash your inner sea serpent and join the celebration on National Sea Serpent Day - explore mermaid tails, ocean-themed activities, and more!
Dive into Fintastic Friday! Celebrate our amazing underwater friends and learn fun, fishy facts while promoting ocean preservation.
An awareness observance on the last Wednesday in March raising awareness for the protection and conservation of manatees and their habitats from threats like boat collisions and pollution.
Get ready to make a splash on Shamu the Whale Day by visiting your local aquarium or learning about these majestic creatures and their conservation efforts!
