Though all days are important, the Friday occupies more importance in Hinduism. Fridays are auspicious days for Hindu and are related to the goddess. Friday is dedicated to Shakti and her multitudes of incarnations; these include Durga and Kali. Goddess Laxmi and Saraswati are also associated with it.
The word “Shukrawar” basically relates to planet Venus which is basically known as “Shukra” in the astrological term which is also related to “Shukracharya”(the Guru of Danavas). And the planet Shukra (Venus) is related to Beauty, Wealth, and Auspiciousness.
Significance of Fasting on Friday
People fast for Shakti (Mother Goddess) and Santoshi Ma, the incarnation of Shakti. The fast is kept in continuation for 16 Fridays. The Friday fast is observed to receive happiness and contentment in their families.
On the 17th Friday, women invite unmarried girls in an odd number, usually, under the age of sixteen to share food with them as well as giving gifts, so that their fasting is complete and bears fruit.