Submarine Day

Submarine Day is March 17th

This day commemorates the invention of the submarine and the technological advancements of the modern submarines. Some celebrate Submarine Day on April 11 which is the anniversary when the U.S. government purchased its first commissioned submarine, but the celebration of Submarine Day is all about the Submarine itself and is more universally celebrated on March 17th when the design of the submarine by Irish engineer John Philip Holland was first presented.