I have never dressed up for Halloween. In fact, it is not a celebration that is part of our culture and I was not aware of it till I stayed in the US for almost a decade and more. My daughters picked it up from there and they enjoyed dressing up with their friends. We have some expat population in the apartment where we stay. So, Halloween is celebrated here too. But the other parts of India might not even know it. Urban India knows it because of the global exposure through internet.