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)
2020
- Wednesday, 8 January 2020 · Budha Pradosh (Shukla)
- Wednesday, 22 January 2020 · Budha Pradosh (Krishna)
- Friday, 7 February 2020 · Shukra Pradosh (Shukla)
- Thursday, 20 February 2020 · Guru Pradosh (Krishna)
- Saturday, 7 March 2020 · Shani Pradosh (Shukla)
- Saturday, 21 March 2020 · Shani Pradosh (Krishna)
- Sunday, 5 April 2020 · Ravi Pradosh (Shukla)
- Monday, 20 April 2020 · Soma Pradosh (Krishna)
- Tuesday, 5 May 2020 · Bhauma Pradosh (Shukla)
- Tuesday, 19 May 2020 · Bhauma Pradosh (Krishna)
- Wednesday, 3 June 2020 · Budha Pradosh (Shukla)
- Thursday, 18 June 2020 · Guru Pradosh (Krishna)
- Thursday, 2 July 2020 · Guru Pradosh (Shukla)
- Saturday, 18 July 2020 · Shani Pradosh (Krishna)
- Saturday, 1 August 2020 · Shani Pradosh (Shukla)
- Sunday, 16 August 2020 · Ravi Pradosh (Krishna)
- Sunday, 30 August 2020 · Ravi Pradosh (Shukla)
- Tuesday, 15 September 2020 · Bhauma Pradosh (Krishna)
- Tuesday, 29 September 2020 · Bhauma Pradosh (Shukla)
- Wednesday, 14 October 2020 · Budha Pradosh (Krishna)
- Wednesday, 28 October 2020 · Budha Pradosh (Shukla)
- Friday, 13 November 2020 · Shukra Pradosh (Krishna)
- Friday, 27 November 2020 · Shukra Pradosh (Shukla)
- Saturday, 12 December 2020 · Shani Pradosh (Krishna)
- Sunday, 27 December 2020 · Ravi 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.