Legend says that goddess Durga defeated Mahishasura, the demon king – and this puja celebrates Ma Durga’s victory over Mahishasura. It starts at the very same time as Navratri, another popular Indian festival.
Being a Hindu, celebrating Durga Puja and Holi are normal. But then my favorite festival is also Eid al-Fitr, the major festival celebrated in Islam all over the world.