Observed on the 13th day of a fortnight, there are two Pradosham in Hindu month. Lord Shiva and Goddess Parvati are the gods who are worshipped on this day. The fasting is observed to achieve success in life, for peace and overcoming all hurdles. February 20 is a day to observe Pradosh Vrat.
There are two ways of fasting on the auspicious day. One could either observe a 24-hour fast without sleeping in the night, or a fasting from sunrise till sunset.
Other ways of observing Pradosh Vrat could be worshipping the Shivling, chanting the Maha Mrityunjaya mantra a 108 times, lighting a single lamp in the period.