Chillai Kalan, the harshest winter period of 40 days, begins with Winter Solstice every year.
This winter Chillai-Kalan began on 21 December 2021 at 9:29 p.m.
The period is followed by Chillai Khurd, 20 days of lesser severe cold, and then 10 days of mild cold called as Chille Bache.
Tonight will be the first night of Chillai-Khurd and tomorrow as the first day.
