Even I did not know of Halloween till I visited the US and the UK..I stayed in those two countries for almost 13 years. My daughters picked up this celebration with their school friends there. And when we moved to India, here in our apartment we have few expat families and even children with one parent from the US. So, the tradition continued. Now, my daughters are grown up and are not excited that much about costumes. But yes, the younger children in the apartment carry on with costumes and trick or treat.Here, we don't know what is Halloween so no costume bought. Yes, Diwali is approaching so will buy new clothes soon.