2011
- Saturday, 1 January 2011 · Shani Pradosh (Krishna)
- Monday, 17 January 2011 · Soma Pradosh (Shukla)
- Monday, 31 January 2011 · Soma Pradosh (Krishna)
- Wednesday, 16 February 2011 · Budha Pradosh (Shukla)
- Wednesday, 2 March 2011 · Budha Pradosh (Krishna)
- Thursday, 17 March 2011 · Guru Pradosh (Shukla)
- Thursday, 31 March 2011 · Guru Pradosh (Krishna)
- Friday, 15 April 2011 · Shukra Pradosh (Shukla)
- Saturday, 30 April 2011 · Shani Pradosh (Krishna)
- Sunday, 15 May 2011 · Ravi Pradosh (Shukla)
- Monday, 30 May 2011 · Soma Pradosh (Krishna)
- Monday, 13 June 2011 · Soma Pradosh (Shukla)
- Tuesday, 28 June 2011 · Bhauma Pradosh (Krishna)
- Tuesday, 12 July 2011 · Bhauma Pradosh (Shukla)
- Thursday, 28 July 2011 · Guru Pradosh (Krishna)
- Thursday, 11 August 2011 · Guru Pradosh (Shukla)
- Friday, 26 August 2011 · Shukra Pradosh (Krishna)
- Friday, 9 September 2011 · Shukra Pradosh (Shukla)
- Sunday, 25 September 2011 · Ravi Pradosh (Krishna)
- Sunday, 9 October 2011 · Ravi Pradosh (Shukla)
- Monday, 24 October 2011 · Soma Pradosh (Krishna)
- Tuesday, 8 November 2011 · Bhauma Pradosh (Shukla)
- Wednesday, 23 November 2011 · Budha Pradosh (Krishna)
- Wednesday, 7 December 2011 · Budha Pradosh (Shukla)
- Thursday, 22 December 2011 · Guru Pradosh (Krishna)
2012
- Friday, 6 January 2012 · Shukra Pradosh (Shukla)
- Friday, 20 January 2012 · Shukra Pradosh (Krishna)
- Sunday, 5 February 2012 · Ravi Pradosh (Shukla)
- Sunday, 19 February 2012 · Ravi Pradosh (Krishna)
- Tuesday, 6 March 2012 · Bhauma Pradosh (Shukla)
- Monday, 19 March 2012 · Soma Pradosh (Krishna)
- Wednesday, 4 April 2012 · Budha Pradosh (Shukla)
- Wednesday, 18 April 2012 · Budha Pradosh (Krishna)
- Thursday, 3 May 2012 · Guru Pradosh (Shukla)
- Friday, 18 May 2012 · Shukra Pradosh (Krishna)
- Saturday, 2 June 2012 · Shani Pradosh (Shukla)
- Saturday, 16 June 2012 · Shani Pradosh (Krishna)
- Sunday, 1 July 2012 · Ravi Pradosh (Shukla)
- Monday, 16 July 2012 · Soma Pradosh (Krishna)
- Monday, 30 July 2012 · Soma Pradosh (Shukla)
- Wednesday, 15 August 2012 · Budha Pradosh (Krishna)
- Wednesday, 29 August 2012 · Budha Pradosh (Shukla)
- Thursday, 13 September 2012 · Guru Pradosh (Krishna)
- Thursday, 27 September 2012 · Guru Pradosh (Shukla)
- Saturday, 13 October 2012 · Shani Pradosh (Krishna)
- Saturday, 27 October 2012 · Shani Pradosh (Shukla)
- Sunday, 11 November 2012 · Ravi Pradosh (Krishna)
- Sunday, 25 November 2012 · Ravi Pradosh (Shukla)
- Tuesday, 11 December 2012 · Bhauma Pradosh (Krishna)
- Tuesday, 25 December 2012 · Bhauma Pradosh (Shukla)
How the date is fixed
Trayodashi, the thirteenth day of each half, kept on the day it is running at pradosh, the twilight after sunset. It is named for its weekday: Soma Pradosh, Shani Pradosh and so on.
About
Pradosh vrat is kept twice a month, on the Trayodashi of each fortnight, during the pradosh period of roughly 96 minutes after sunset. The day is chosen so that Trayodashi is running at sunset, even if it is absent at sunrise; when it touches sunset on two days, the first is usually taken. Each weekday gives the observance a name, Soma Pradosh on Monday and Shani Pradosh on Saturday being the ones most often singled out. In Tamil Nadu the Pradosham puja at Shiva temples, with the Nandi abhisheka, is a regular feature of temple calendars.
How it is observed
A fast until dusk and Shiva worship with abhisheka in the pradosh window after sunset.