- Observed on May 11
- To celebrate the anniversary of first of the five tests of Operation Shakti (Pokhran-II) nuclear test, held on 11 May 1998 in Pokhran, Rajasthan.
- The operation was led by the former President APJ Abdul Kalam.
- After conducting two more tests as a part of the Pokhran-II/Operation Shakti initiative, India was declared as a nuclear state by the then Prime Minister Atal Bihari Vajpayee.