Dhanu Sankranti 2141

Dhanu Sankranti marks the Sun's transit into Sagittarius and the start of Dhanurmasa (Shunya Masa), the month leading up to Makara Sankranti. It is a Shadshitimukhi Sankranti in the traditional classification used for Punyakala timing.

The exact moment the Sun crosses into Dhanu (Sagittarius) is called the Sankranti. The Punyakala is the auspicious window around that moment -- its exact length and placement (before or after the Sankranti, and how it is measured) follows a traditional rule that depends on which of the twelve Sankrantis this is; Karka and Makara Sankranti (the two Ayana Sankrantis, marking the start of Dakshinayana and Uttarayana) each have their own distinct rule, and the Vishuva (Mesha/Tula), Vishnupadi, and Shadshitimukhi Sankrantis each follow one of three other rules. Charity (daan), holy baths, and worship performed during the Punyakala window are traditionally held to be especially meritorious.