National Submarine Day is a holiday that’s observed on the 11th of April each year. It’s a day that commemorates the day when the U.S Navy acquired its first modern commissioned submarine in 1900. This submarine was called the Holland VI and it was invented by John Phillip Holland.

On April 11, 1900, the U.S government purchased this sub for $150,000-the equivalent of 4.8-million in 2021. This is a great day for people to learn more about submarines or for submarine fans to take the time out of their day to visit one of the many submarine exhibitions, exhibits, or memorials located all across the United States.

Facts About Submarines

Below are some super facts about submarines that we’d like to share with everyone now.

• The first submarine was invented by Dutch inventor Cornelis Drebbel in 1620.
• The USS Nautilus was the first nuclear-powered submarine and it was launched in 1954.
• Submarines use ballasts to rise and sink.
• In the 1750s, England granted more than 12 patents for submarines.

Observing National Submarine Day

All across the U.S., there are submarines that have been designated as memorials and we feel those are the perfect places for people to observe this holiday. Some of the U.S submarines marked as memorials include the Albacore in Portsmouth, New Hampshire; the Cod in Cleveland, Ohio; and the Razorback in North Little Rock, Arkansas. People can also learn more about submarines and their use by the U.S military. People should also use the hashtag #NationalSubmarineDay to spread the word about this holiday.