Guwahati, Jan. 14 -- People around the world celebrate various harvest festivals. A harvest festival is an annual celebration, which occurs around the time of the main harvest of a given region. According to the regional differences in climate and crops, harvest festivals can be found at various times throughout the world. Celebrated all over the country in India, Makar Sankranti is the oldest and the most colourful harvest festival of India. As per Hindu mythology, this festival makes the end of an unfavourable phase and the beginning of a holy phase. According to the lunar calendar, when the sun moves from the Tropic of Cancer to the Tropic of Capricon or from Dakshinayana to Uttarayana, in the month of Poush in mid-January, it commemora...