Lohri is celebrated on January 13, 2018. Lohri is an extremely popular festival celebrated by the Punjabi people. This agricultural winter festival is celebrated in Punjab, Himachal Pradesh, Delhi, Uttrakhand and Jammu. The origins of Lohri are many and link the festival to Punjab. Many people believe the festival was originally celebrated on winter solstice day, being the shortest day and the longest night of the year.
With time, the festival spread to the states adjoining Punjab - Sindh, Jammu, Haryana, Himachal Pradesh and Delhi. Lohri falls in the month of Paush i.e. around 13 January, as per the Gregorian calendar. It is, actually, celebrated a day before Makara Sankranthi, as it marks the end of the winter season. The sun usually enters the Nirayana Makara rashi (Capricorn) on January 14.
There are many origins of Lohri: all forming part of folklore. A key feature of Lohri is the bonfire, it signifies the return of longer days. During the day, children go from door to door singing folk songs in praise of Dulha Bhatti. These children are given sweets and savories, and occasionally, money. Turning them back empty-handed is regarded inauspicious. (With material from: Wikipedia)