ANSWER: 11th
Explanation:
On this day, Addl. Principal Secretary to the Prime Minister, Dr. P. K Mishra while presiding as the Chief Guest for Valedictory session, praised the NDMA for relief and rehab efforts in Kashmir and quake hit Nepal. This was followed by technical sessions to examine issues pertaining to four major calamities, namely, cyclone, earthquake, floods and landslides. The 11th Formation Day was observed at Vigyan Bhawan marketing the completion of 10 years of efforts to strengthen and improve disaster risk reduction.