It is that time of the year again in Kolkata. The sound of the dhaak, the fragrance of incense in the autumn breeze, fleecy white clouds, and the ethereal white kash phool&mdashall herald the biggest festival in the city, Durga Puja. This time it will be even more special because, one, it is being held after two years (due to the pandemic), and two, the festival has been given a UNESCO intangible heritage tag.