Puthandu 2026 (Varusha Pirappu/Chithirai Vishu) falls on 14 April, coinciding with Mesha Sankrantithe Sun’s sidereal ingress into Mesha Rashi (Aries)and inaugurates Parabhava Nama Samvatsaram. The article explains the Tamil Sauramana (solar) calendar’s reliance on the sidereal zodiac, why the New Year clusters around mid-April, and how local panchangams use the precise Sankranti moment to guide…