NATIONAL DAYHISTORY & MILITARY

National Submarine Day

National Submarine Day is a reminder that the best table is a crowded one — plates passing, seconds offered, everyone fed.

APR11

Sunday, April 11Every year on April 11

days to go

Roots: Established to honor the USS Holland, the first commissioned submarine in 1900.
Vibe: A day of reflection and appreciation for maritime service.
Also on Apr 11: International Louie Louie Day · World Parkinson’s Day · Barbershop Quartet Day
Hashtag: #NationalSubmarineDay

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Ways to celebrate

Small, doable ways to celebrate National Submarine Day.

Host a low-stakes dinner — everyone brings one thing.
Cook submarine the way a family member taught you, if you can.
Order from a locally owned spot that could use the business.
Make a double batch and drop half off to a friend.
Eat together without screens — even for 20 minutes.

Make it your kind of celebration

Family
Pick a recipe together, assign jobs, and serve it family-style. The cooking is the conversation.
Kids
Let the kids build their own version — tacos, pizzas, sandwiches. Their plate, their rules.
Couples
Pick one recipe you've both never made and cook it together, no outside help.
Office
Do a shared lunch instead of the usual — team potluck, takeout from a local spot, or a catered tray.
School
Tie the meal into a cultural or geography lesson — ingredients, origins, stories.
Community
Organize a neighborhood potluck or contribute to a community meal at a shelter or church.
Just me
Cook one real meal for yourself. Plate it like company's coming.

Plan ahead

National Submarine Day is observed on April 11 every year. Here is where it lands for the next ten years, handy for planners, marketers and party people.

2026Sat, Apr 11this year

2027Sun, Apr 11

2028Tue, Apr 11

2029Wed, Apr 11

2030Thu, Apr 11

2031Fri, Apr 11

2032Sun, Apr 11

2033Mon, Apr 11

2034Tue, Apr 11

2035Wed, Apr 11

2036Fri, Apr 11

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Fast facts

The U.S. Navy operates 68 submarines as of 2023.

Submarines can operate underwater for months at a time.

The story

National Submarine Day is celebrated annually on April 11, marking the anniversary of the commissioning of the USS Holland in 1900. This day pays tribute to the vital role submarines have played in naval warfare and national security. From their stealthy operations during World War I to their strategic importance in the Cold War, submarines have shaped the course of maritime history.

Read the full story

The USS Holland, designed by Irish engineer John Philip Holland, was the first submarine to be commissioned by the U.S. Navy. This pioneering vessel paved the way for modern submarines, which have since evolved into complex machines equipped with advanced technology. Today, submarines serve a dual purpose, performing both strategic deterrence and intelligence-gathering missions.

Submarine service is known for its unique challenges, including the psychological strain of long deployments and the technical expertise required to operate advanced systems. Submariners undergo rigorous training and must demonstrate exceptional teamwork and resilience. Each mission enhances their skills and reinforces their commitment to protecting the nation's interests beneath the waves.

As we observe National Submarine Day, it is essential to acknowledge not only the technology but also the men and women who serve aboard these remarkable vessels. Their dedication and bravery contribute significantly to the security of our nation, making this day a fitting occasion to educate ourselves and honor their sacrifices.