Observances of Diwali differ depending on region and tradition. Among Hindus the most widespread custom is the lighting of diyas (small earthenware lamps filled with oil) on the night of the new moon to invite the presence of Lakshmi, the goddess of wealth. Diwali is generally a time for visiting, exchanging gifts, wearing new clothes, feasting, feeding the poor, and setting off fireworks (though such displays have been restricted to limit noise and other environmental pollution).