Gangasagar Mela in West Bengal, India. Gangasagar Mela is the largest fair celebrated in West Bengal, India. Makar Sankranti is celebrated in the last day of the Bengali month of Poush. In Bengal, this day is one of the most auspicious day of the year. Thousands of pilgrims from different parts of the country gather at Gangasagar, the point where the holy river Ganges meets the sea, to take a dip and wash away all the earthly sins. Makar Sankranti falls on the day of the year when the sun-considered the king of all grahas (planets)-is in the rashi (zodiac sign) known as Makar (Capricorn). This is considered the most beneficial and auspicious zodiac of the sun. The calculations for determining Makar Sankranti are done according to the solar calendar. Therefore, Makar Sankranti always falls on the 14th January according to the English calendar. It is usually the month of Magh of the Hindu calendar, the 'Tithi' or the position of the moon keeps shifting because of the difference in calculations.