Hindus follows special fasting days of the week
Sunday
It is observed for the Lord Sun or Surya. Red is the color of this day. It is believed that this fast helps you in fulfilling desires. People suffering from skin diseases also observe this fast to get rid of it. Extra importance is given to cleanliness of the body and surroundings. Red flowers are offered for prayers and red colored sandalwood tilak is applied on the forehead.
Monday
It is observed for Lord Shiva. On this day unmarried girls observe fast to find an ideal husband and married women fast to pray for a prosperous married life. Fasting on Mondays begins at sunrise and ends at sunset. On this day, food is only eaten after evening prayer. Lord Shiva and his consort Goddess Parvati are worshipped, but of course no worship begins without remembering their elephant-headed son Lord Ganesha.
Tuesday
Tuesday fasts are either observed for Lord Hanuman or for Planet Mars called Mangal in Hindi. This fast is observed by people to alleviate the problems from their life as they pray to Lord Hanuman, who is also known as Sankat Mochan (the Problem Solver). However, some communities might be worshipping other deities on Tuesday. But in most regions Tuesday is dedicated to Hanuman. People wear red colored clothes on the day and offer red flowers to Lord Hanuman. It is believed that Lord Hanuman will help his devotees in overcoming difficulties in life.