🌍 observance
National Submarine Day
Saturday, April 11, 2026
— days to go
In 1620, Invention of. Submarine. Cornelius van Drebbel invents the first navigable submarine, making several submerged voyages along the Thames River
History
Invention of Submarine. Cornelius van Drebbel invents the first navigable submarine, making several submerged voyages along the Thames River
How It's Celebrated
National Submarine Day is observed by recognizing the importance of the day, learning about its background and significance, and sharing awareness with others through conversation and social media. Many people take time to reflect on the meaning of the observance and participate in relevant activities or community events.
Other Years
2021 Sun
11 Apr 2022 Mon
11 Apr 2023 Tue
11 Apr 2024 Thu
11 Apr 2025 Fri
11 Apr 2026 Sat
4/11 2027 Sun
11 Apr 2028 Tue
11 Apr 2029 Wed
11 Apr