Indian Navy Day Today! 49 New Delhi: Indian Navy Day is celebrated every year on December 4 to commemorate the attack on the Karachi harbour during the India-Pakistan war in 1971. On this day, the Indian Navy’s attack on Karachi harbour contributed to the ultimate victory of the Indian Armed Forces over Pakistan. The theme of Navy Day 2020 is “Indian Navy Combat Ready, Credible & Cohesive”. The role of the Indian Navy is to secure the marine edges of the country and update the worldwide relations of India through seaport visits, joint exercises, altruistic missions, upheaval help, etc. Its objective is also to improve the circumstance in the Indian Ocean Zone.