friday is dedicated to Shakti, the mother goddess associated with the planet Venus; Goddesses Durga and Kali also are worshiped. Devotees perform the ceremonies of Durga Aarti, Kali Aarti, and santoshi Mata Aarti on this day. Hindus seeking material wealth and happiness fast to honor Shakti, eating only a single meal after sunset.
Because white is the color most closely associated with Shakti, the evening meal typically consists of white foods such as kheer or payasam, a dessert made of milk and rice. Offerings of chana (Bengal gram) and gur (jaggery or solid molasses) are given to appeal to the goddess, and sour foods are to be avoided.
Other colors associated with Shakti include orange, violet, purple, and burgundy, and her gemstone is the diamond.