Celebrated every year on August 22 to commemorate the founding of Madras, now Chennai.
It is believed that it was on this date in 1639 that the deed for the purchase of the village of Madraspatnam (Chennapatnam) was signed between the East India Company (represented by Andrew Cogan and Francis Day) and Damarla Venkatadri Nayaka, the viceroy of the Vijayanagar Empire.