But what is the festival celebrating, what are the Diwali 2025 dates and how can you wish someone a Happy Diwali? Diwali is also known as dipavali, which translates to mean “rows of lighted lamps" — one of the most recognisable traditions of the festival is the display of small lighted oil lamps called 'diyas.' In Hindu tradition, Diwali is associated with the story of Rama, a warrior prince, who was married to Sita.