Submarine Day

April 17, Wednesday

Submarine Day is observed on April 11 to commemorate the first successful dive of a submarine, which occurred on this date in 1900. This significant milestone in naval history marked the beginning of modern submarine capabilities and underwater exploration.

Submarine Day – days left: 119. Create Countdown to Event

Submarine Day in other years

2021 April 17, Saturday
2022 April 17, Sunday
2023 April 17, Monday
2025 April 17, Thursday