Today, 5 February 2012 is Bhanu Pradosh. As it falls on Bhanuvara (Sunday), it is also referred to as Bhanu Pradosh Shiva Puja. It is Shukla Paksha Trayodasi in Magh Month as per all lunar Hindu calendars.
Pradosha Kaala Shiva Puja time is between 4.30 to 6 in the evening.
Pradosha Ashtakam is a popular prayer chanted during Pradosh Shiva Puja.