2018
- Sunday, 14 January 2018 · Ravi Pradosh (Krishna)
- Monday, 29 January 2018 · Soma Pradosh (Shukla)
- Tuesday, 13 February 2018 · Bhauma Pradosh (Krishna)
- Tuesday, 27 February 2018 · Bhauma Pradosh (Shukla)
- Wednesday, 14 March 2018 · Budha Pradosh (Krishna)
- Thursday, 29 March 2018 · Guru Pradosh (Shukla)
- Friday, 13 April 2018 · Shukra Pradosh (Krishna)
- Friday, 27 April 2018 · Shukra Pradosh (Shukla)
- Sunday, 13 May 2018 · Ravi Pradosh (Krishna)
- Saturday, 26 May 2018 · Shani Pradosh (Shukla)
- Monday, 11 June 2018 · Soma Pradosh (Krishna)
- Monday, 25 June 2018 · Soma Pradosh (Shukla)
- Tuesday, 10 July 2018 · Bhauma Pradosh (Krishna)
- Tuesday, 24 July 2018 · Bhauma Pradosh (Shukla)
- Thursday, 9 August 2018 · Guru Pradosh (Krishna)
- Thursday, 23 August 2018 · Guru Pradosh (Shukla)
- Friday, 7 September 2018 · Shukra Pradosh (Krishna)
- Saturday, 22 September 2018 · Shani Pradosh (Shukla)
- Saturday, 6 October 2018 · Shani Pradosh (Krishna)
- Monday, 22 October 2018 · Soma Pradosh (Shukla)
- Monday, 5 November 2018 · Soma Pradosh (Krishna)
- Tuesday, 20 November 2018 · Bhauma Pradosh (Shukla)
- Tuesday, 4 December 2018 · Bhauma Pradosh (Krishna)
- Thursday, 20 December 2018 · Guru Pradosh (Shukla)
2019
- Thursday, 3 January 2019 · Guru Pradosh (Krishna)
- Friday, 18 January 2019 · Shukra Pradosh (Shukla)
- Saturday, 2 February 2019 · Shani Pradosh (Krishna)
- Sunday, 17 February 2019 · Ravi Pradosh (Shukla)
- Sunday, 3 March 2019 · Ravi Pradosh (Krishna)
- Monday, 18 March 2019 · Soma Pradosh (Shukla)
- Tuesday, 2 April 2019 · Bhauma Pradosh (Krishna)
- Wednesday, 17 April 2019 · Budha Pradosh (Shukla)
- Thursday, 2 May 2019 · Guru Pradosh (Krishna)
- Thursday, 16 May 2019 · Guru Pradosh (Shukla)
- Friday, 31 May 2019 · Shukra Pradosh (Krishna)
- Friday, 14 June 2019 · Shukra Pradosh (Shukla)
- Sunday, 30 June 2019 · Ravi Pradosh (Krishna)
- Sunday, 14 July 2019 · Ravi Pradosh (Shukla)
- Monday, 29 July 2019 · Soma Pradosh (Krishna)
- Monday, 12 August 2019 · Soma Pradosh (Shukla)
- Wednesday, 28 August 2019 · Budha Pradosh (Krishna)
- Wednesday, 11 September 2019 · Budha Pradosh (Shukla)
- Thursday, 26 September 2019 · Guru Pradosh (Krishna)
- Friday, 11 October 2019 · Shukra Pradosh (Shukla)
- Friday, 25 October 2019 · Shukra Pradosh (Krishna)
- Saturday, 9 November 2019 · Shani Pradosh (Shukla)
- Sunday, 24 November 2019 · Ravi Pradosh (Krishna)
- Monday, 9 December 2019 · Soma Pradosh (Shukla)
- Monday, 23 December 2019 · 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.