The festival of Raksha-Bandhan was fixed on the day of Shrawani Poonam only because the Indian culture has a plan for making right use of will power. One who gets sacrifice or worship performed for oneself by a Brahmin priest is tied a kalawa, an amulet for protection, by the priest. This is tied so that one is protected from any dosha or disease affecting one’s body which may hamper one’s power of determination. In the month of Shrawan, the earth gets less sunlight. Therefore, different kinds of germs multiply rapidly which cause diarrhea, vomiting, indigestion, fever and body-ache. Hence on the day of Raksha-Bandhan, Raksha-sutra is tied and resolve is made for the protection of the health on physical, mental and intellectual planes. What a deep psychology and mystery supports the tradition of Raksha-Sutra!