Shop our 2024 calendars. Now available for purchase!
Image for National Oyster Day

National Oyster Day

Oysters, bivalve mollusks that live in the shallow waters of oceans, are celebrated today with National Oyster Day. They live near the ocean's bottom, clustering and attaching themselves to hard surfaces and shells, forming colonies called beds or reefs. These provide a habitat for other marine life and hold back waves, staving off erosion, flooding, and coastal storms. Oysters feed by filtering water. Water flows over their gills and they extract algae, plankton, and other food particles for food. They may filter 50 gallons of water a day, which improves the water's quality and keeps it clean for other marine life.

There are over 200 species of oysters, of which only a handful are eaten. The most widespread species in the United States are the Eastern oyster (Crassostrea virginica) and Pacific oyster (Crassostrea gigas). The former is found in Atlantic waters from Canada to South America, and the latter is found in Pacific waters from Japan to Washington State in the north, and south to Australia. Three other species can be found in US waters: the Ostrea conchaphila on the West Coast, and European Flat oysters (Ostrea edulis) and Kumamatos (Crassostrea sikamea), which are grown for specialty markets. Oysters may be given other names to indicate more precisely where they are from. For example, Eastern oysters from Maryland and Virginia are known as Chesapeake Bay Oysters, and Pacific oysters from Washington are known as Willapa Oysters.

The water oysters live in and the way they are cultivated has an effect on their size, shape, taste, color, and texture. Oysters range from 3 to 14 inches in length and usually are oval or pear-shaped. Their outer shell usually is whitish-gray, with its inner part being porcelain white. They may taste salty, sweet, metallic, earthy, or buttery, and may have a soft, firm, chewy, or gooey texture. In the United States, oysters on the East Coast tend to be milder, smaller, and saltier than those on the West Coast, where they tend to be sweet and creamy. Natural cultivation uses existing oyster beds, while farmed cultivation, or aquaculture, uses structures and facilities to encourage and support growth in coastal areas.

Raw oysters are high in protein and low in calories and fat. They are high in minerals like magnesium, calcium, zinc, iron, and selenium, and contain B-vitamins and omega 3 fatty acids. They can be prepared and eaten in just about any way imaginable. They can be served fresh and raw on the half shell, topped with butter, salt, lemon juice, hot sauce, or mignonette sauce. They can be fried, baked, steamed, broiled, boiled, smoked, grilled, roasted, stewed, deviled, creamed, pickled, and be used to make Oysters Rockefeller. They can be used in soups, chowders, casseroles, stews, and jambalaya. With so many ways to be eaten, there is a lot to celebrate about oysters today!

How to Observe National Oyster Day

The following are some ideas on how you could observe National Oyster Day:

Exclusive Content

Enjoying Checkiday? It takes a lot of support from fans like you to run a free website. For exclusive content and other perks, please consider supporting us on Patreon. Thank you!


This event does not currently have a sponsor. If you'd like to increase visibility for this event while gaining exposure for yourself or your brand, you can learn more here!

Something Wrong or Missing?

We would love to hear from you! Please contact us using this form.

Observation Notifications

Would you like to be notified before the next observation? Add this event directly to your calendar with this link. You may also sign up here to be told when other notifications are available!

Also on this date…