A special day of worship of Lord Vishnu is considered to be Thursday. This special occasion of worship is on this day. According to the scriptures, where it is related to Jupiter, it is also called the day of Narayana. Not only this, Sai’s day is also considered on Thursdays. All the sufferings of the devotees are defeated only by the remembrance of Lord Vishnu as described in the scriptures. Those devotees worship Lord Vishnu with a true heart. The Lord is pleased with them and fulfills their desire.