Mesh Sankranti, also called the Solar New Year, depicts the true “Spring Cleaning” of the soul. It is the time when the Sun enters the first sign of the zodiac. Read the following piece to know more about Mesh Sankranti 2026. Poila Baisakh in Bengal involves opening the Haal Khata (new accounting books), while in Assam, Bohag Bihu is characterised by the air filled with aroma of lilies and the sound of the Pepa (a horn instrument ).