Here’s Everything You Need To Know About Chillai Kalan Know Kashmir 1. The most severe part of the winter in Kashmir consists of three months. It is divided into three parts called the Chilas:- The Chillai Kalan, the Chillai Khurd, and the Challai Bache. 2. Chillai-Kalan, is the 40-day period of harsh winter. Chillai-Kalan begins from December 21 and ends on January