Compared to other religious festivals, Christmas is quite a small festival in India, due to the number of people who are Christians (about 2.3%) compared to people who belong to other religions. Having said this, the population of India is over 1 Billion, so there are over 25 million Christians in India!
One of the largest Indian Christian Communities is in Mumbai. A lot of the Christians in Mumbai (previously known as Bombay) are Roman Catholics.