The PRADOSHA worship is to be done in the evening twilight on the 13th day of each lunar fortnight.
It is the worship of Lord Shiva for victory and success in all undertakings, and the fulfilment of all your heart’s cherished desires. When you desire to obtain a favour from a superior person, don’t you naturally approach him at a moment when he is likely to be in a very pleasant frame of mind? You will perhaps see him after he has had a good dinner and is happily chatting with a friend in a hearty, expansive mood. Even so, the Hindu, especially the Hindu who is engaged in the motivated type of worship, usually selects the most pleasant aspect of God for his worship. He performs it at a time which the ancient Rishis experienced as being the most helpful and efficacious in propitiating the Deity. The Pradosha worship is based on such mystic psychology.
A gift of a pot, a cloth and an image of the Lord is given to a Brahmin to conclude the worship. A very important point to be remembered in this connection is that during this auspicious period all the hosts of celestial beings and gods come down from the heavens and attend the worship in their subtle forms. This adds immensely to the sanctity of the worship. This Vrata is highly lauded by the scriptures and is of very great sanctity and importance to worshippers of Lord Shiva. The mere sight of the Deity in a temple during this period will destroy all sins and bestow bountiful blessings and Grace upon the fortunate beholder. Even a single bael leaf (leaf taken from the wood-apple tree) offered to the Lord at this unique, auspicious moment equals a hundred Mahapujas.
It is usual to have special additional lights in the shrine during the Pradosha. To light even a single wick at this juncture is highly meritorious and productive of untold benefits, spiritual as well as material. Most fortunate and blessed is the person who performs the Pradosha Vrata, for upon him Lord Shiva showers His choicest Grace and blessings in a very short time.