Vamana dwadashi is celebrated on the twelfth day of the bright half of the Hindu month- chaitra. A devotee should observe a fast and worship lord Vamana by saying the following prayer- “O Lord! Vamana- the dwarfish incarnation of the almighty Vishnu, who took incarnation on the auspicious day of dwadashi in the month of chaitra- I seek your blessings.” One who observes a fast on this day is blessed and protected from all kinds of danger.