legend of mahashivratri

Here is the story.According to a legend in the Shiva Purana, once Brahma and Vishnu were fighting over who was the superior of the two. Horrified at the intensity of the battle, the other gods asked Shiva to intervene. To make them realize the futility of their fight, Shiva assumed Linga form of a huge column of fire in between Brahma and Vishnu. Awestruck by its magnitude, they decided to find one end each to establish supremacy over the other. Brahma assumed the form of a swan and went upwards and Vishnu as Varaha went into the earth. The column of fire had no limit and though they searched for thousands of miles, neither could find the end. On his journey upwards, Brahma came across aketaki flower wafting down slowly. When asked where she had come from, Ketaki replied that she had been placed at the top of the fiery column as an offering. Unable to find the uppermost limit, Brahma decided to end his search and take the flower as a witness. At this, the angry Shiva revealed his true form. He punished Brahma for telling a lie, and cursed him that no one would ever pray to him. The ketaki flower too was banned from being used as an offering for any worship, as she had testified falsely. Since it was on the 14th day in the dark half of the month of Phalguna that Shiva first manifested himself in the form of a linga, the day is especially auspicious and is celebrated asMahashivratri.