2015
- Friday, 2 January 2015 · Shukra Pradosh (Shukla)
- Sunday, 18 January 2015 · Ravi Pradosh (Krishna)
- Sunday, 1 February 2015 · Ravi Pradosh (Shukla)
- Monday, 16 February 2015 · Soma Pradosh (Krishna)
- Monday, 2 March 2015 · Soma Pradosh (Shukla)
- Wednesday, 18 March 2015 · Budha Pradosh (Krishna)
- Wednesday, 1 April 2015 · Budha Pradosh (Shukla)
- Thursday, 16 April 2015 · Guru Pradosh (Krishna)
- Friday, 1 May 2015 · Shukra Pradosh (Shukla)
- Friday, 15 May 2015 · Shukra Pradosh (Krishna)
- Sunday, 31 May 2015 · Ravi Pradosh (Shukla)
- Sunday, 14 June 2015 · Ravi Pradosh (Krishna)
- Monday, 29 June 2015 · Soma Pradosh (Shukla)
- Monday, 13 July 2015 · Soma Pradosh (Krishna)
- Wednesday, 29 July 2015 · Budha Pradosh (Shukla)
- Tuesday, 11 August 2015 · Bhauma Pradosh (Krishna)
- Thursday, 27 August 2015 · Guru Pradosh (Shukla)
- Thursday, 10 September 2015 · Guru Pradosh (Krishna)
- Friday, 25 September 2015 · Shukra Pradosh (Shukla)
- Saturday, 10 October 2015 · Shani Pradosh (Krishna)
- Sunday, 25 October 2015 · Ravi Pradosh (Shukla)
- Sunday, 8 November 2015 · Ravi Pradosh (Krishna)
- Monday, 23 November 2015 · Soma Pradosh (Shukla)
- Tuesday, 8 December 2015 · Bhauma Pradosh (Krishna)
- Wednesday, 23 December 2015 · Budha Pradosh (Shukla)
2016
- Thursday, 7 January 2016 · Guru Pradosh (Krishna)
- Thursday, 21 January 2016 · Guru Pradosh (Shukla)
- Saturday, 6 February 2016 · Shani Pradosh (Krishna)
- Saturday, 20 February 2016 · Shani Pradosh (Shukla)
- Sunday, 6 March 2016 · Ravi Pradosh (Krishna)
- Sunday, 20 March 2016 · Ravi Pradosh (Shukla)
- Tuesday, 5 April 2016 · Bhauma Pradosh (Krishna)
- Tuesday, 19 April 2016 · Bhauma Pradosh (Shukla)
- Wednesday, 4 May 2016 · Budha Pradosh (Krishna)
- Thursday, 19 May 2016 · Guru Pradosh (Shukla)
- Thursday, 2 June 2016 · Guru Pradosh (Krishna)
- Friday, 17 June 2016 · Shukra Pradosh (Shukla)
- Saturday, 2 July 2016 · Shani Pradosh (Krishna)
- Sunday, 17 July 2016 · Ravi Pradosh (Shukla)
- Sunday, 31 July 2016 · Ravi Pradosh (Krishna)
- Monday, 15 August 2016 · Soma Pradosh (Shukla)
- Monday, 29 August 2016 · Soma Pradosh (Krishna)
- Wednesday, 14 September 2016 · Budha Pradosh (Shukla)
- Wednesday, 28 September 2016 · Budha Pradosh (Krishna)
- Thursday, 13 October 2016 · Guru Pradosh (Shukla)
- Thursday, 27 October 2016 · Guru Pradosh (Krishna)
- Saturday, 12 November 2016 · Shani Pradosh (Shukla)
- Saturday, 26 November 2016 · Shani Pradosh (Krishna)
- Sunday, 11 December 2016 · Ravi Pradosh (Shukla)
- Monday, 26 December 2016 · Soma Pradosh (Krishna)
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.