Pradosham literally means the removal of sins. These times are the windows of opportunity to remove karma or karmic energies that limit our potential in this current life. Pradosham, which is the thirteenth phase of the dark or bright moon, is the time designated for Lord Shiva to remove the bad karma of people. There are two Pradosham days in a month. There is only one temple where this daily Pradosham is very effective because of its association with Nandi, the bull of Lord Shiva. The bull was sent to the earth plane to initiate the daily removal of sins at the temple called Koyampet near Chennai. Participants of the daily karma removal program will have an archana ceremony done for them on daily basis during the Pradosham time (sunset).
All Pradoshams occur between 1-1/2 hours before and right up until the moment of sunset in the time zone where you are living physically.
A Pradosham period is considered to be very auspicious. The name Pradosh indicates the twilight period, that is, the period just before sunset and immediately after sunset. We can pray to God by performing abhishekam. Milk gives long life. Ghee gives moksha. Sandal gives Lakshmi’s grace and there are lots more. Generally, the twilight period is aound 1.5 hours before sunset i.e from 4.30 P.M to 6.00 P.M. During this period, the devotees are aware that Lord Shiva and Mother Parvati are at their best cheerful mood. Anyone asking for blessings and offerings are highly blessed by the couple during the Pradosham period.
These Pradoshams occur twice each month – on the 13th (Trayodashi) moon day after the New Moon and after the Full Moon.
Pradosha vrata is a vrata (Fast) of Lord Shiva and Mother Parvati. The Pradosha worship is done in the evening twilight on the Trayodashi of both lunar fortnights (Shukla and Krishna Paksha). These are the 13th tithi, or lunar days, from the New Moon (Amavasya) and Full Moon (Purnima).