January 15th holds significant religious importance among Hindus as it marks the transition of the Sun from the Dakshinayana (South) to the Uttarayana (North) hemisphere. This auspicious day signifies the Sun's movement from the Sagittarius zodiac to the Capricorn sun sign. Hindus celebrate this festival with immense fervor and enthusiasm, recognizing it as a time of transition and change in the celestial alignment.