On Makar Sankranti, the sun enters the sun-sign of Capricorn or Makara (the Indian rashi). Therefore the ‘Makar’ in the name. The word ‘Sankranti’ signifies the movement of the sun from one zodiac sign to another. Thus, the name of the festival literally means the movement of the sun into Capricorn. As Makar Sankranti is one of the oldest solstice festivals and falls on the equinox, day and night on this day are believed to be equally long. Post the festival, it is officially the beginning of spring or the onset of Indian summer and the days become longer, and nights shorter. Though extremely popular as Makar Sankranti, the festival is predominantly a harvest festival and is celebrated throughout India, from north to south and east to west. While Makar Sankranti is most popular in West India, down south, the festival is known as Pongal and in the north, it is celebrated as Lohri. Uttarayan, Maghi, Khichdi are some other names of the same festival.