The Mahabharata carries a famous reference to Uttarayan and Dakshinayan. Bhishma Pitamah, lying on his bed of arrows at Kurukshetra, chose not to die during Dakshinayan. He held on — through immense pain — until the Sun began its northward journey at Makar Sankranti, because he had the boon of choosing his moment of death and believed Uttarayan was the auspicious time for a warrior's soul to depart. That story has made the Uttarayan-Dakshinayan divide one of the most resonant concepts in Hindu sacred time.

Karka Sankranti, as the starting point of Dakshinayan, thus carries weight not just astronomically but within the narrative tradition of how Indians have always thought about time, seasons, and what the cosmos is doing at any given moment.

In Bengal specifically, Karka Sankranti also marks the beginning of the Karka solar month — what the Bengali calendar calls the month of Shravan, the heart of monsoon season. The rivers swell. The paddy fields turn green. The air smells of wet earth. This is the month of Jhulan Yatra (the swing festival of Radha-Krishna) and the month that leads directly to Raksha Bandhan.

The Sankranti transit time — listed in the Bengali panjika to the precise minute — determines when this window opens and closes. The window extends roughly 16 ghatikas (about 6.5 hours) before and after the transit moment. Dana (charity) and Snan (ritual bathing) performed within this window are considered especially meritorious.

In 2026, since Karka Sankranti coincides with Ratha Jatra, the day already carries the heightened energy of a major festival. The combination creates an unusual concentration of ritual significance — a day where both the annual chariot festival and the Sun's most important directional shift happen together.