Diwali is a Hindu festival of lights, held in the period October to November. It is particularly associated with Lakshmi, the goddess of prosperity.  Thousands of oil lamps and other lights are lit during this time, so it is, like so many other Hindu festivals, very beautiful.  Here is a photo, from the website mydestination.com, of an arrangement of Diwali lanterns and floor decorations called rangoli, which are made with colored powders.  Breathtaking!