Submarine Day takes place on March 17, 2026. Submarine Day celebrates the day that John Philip Holland, an Irish engineer, first successfully demonstrated his submarine called the Holland VI. On St. Patrick’s Day, 1898, ist made her first successful submerged run which impressed observers by the US Navy Department.
We have placed a detailed description of this event on this page: Submarine Day 2025. For further information please stop by there!
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