In Hinduism, each day of a week is dedicated to a particular god in the Hindu pantheon. Apart from the special Vratas and Upvaas, many Hindus also fast on a particular day in a week.
Each day in a week has a specialty and there are numerous folklores associated with the fasting observed on the days of a week.
Sunday is dedicated to Lord Surya (Sun God). Those who undertake fast (upvaas) on the day only take a single meal. Oil and salt is avoided. Red is the color of the day and red flowers are offered to Surya.
