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)
2021
- Sunday, 10 January 2021 · Ravi Pradosh (Krishna)
- Tuesday, 26 January 2021 · Bhauma Pradosh (Shukla)
- Tuesday, 9 February 2021 · Bhauma Pradosh (Krishna)
- Wednesday, 24 February 2021 · Budha Pradosh (Shukla)
- Wednesday, 10 March 2021 · Budha Pradosh (Krishna)
- Friday, 26 March 2021 · Shukra Pradosh (Shukla)
- Friday, 9 April 2021 · Shukra Pradosh (Krishna)
- Saturday, 24 April 2021 · Shani Pradosh (Shukla)
- Saturday, 8 May 2021 · Shani Pradosh (Krishna)
- Monday, 24 May 2021 · Soma Pradosh (Shukla)
- Monday, 7 June 2021 · Soma Pradosh (Krishna)
- Tuesday, 22 June 2021 · Bhauma Pradosh (Shukla)
- Wednesday, 7 July 2021 · Budha Pradosh (Krishna)
- Wednesday, 21 July 2021 · Budha Pradosh (Shukla)
- Thursday, 5 August 2021 · Guru Pradosh (Krishna)
- Friday, 20 August 2021 · Shukra Pradosh (Shukla)
- Saturday, 4 September 2021 · Shani Pradosh (Krishna)
- Saturday, 18 September 2021 · Shani Pradosh (Shukla)
- Monday, 4 October 2021 · Soma Pradosh (Krishna)
- Sunday, 17 October 2021 · Ravi Pradosh (Shukla)
- Tuesday, 2 November 2021 · Bhauma Pradosh (Krishna)
- Tuesday, 16 November 2021 · Bhauma Pradosh (Shukla)
- Thursday, 2 December 2021 · Guru Pradosh (Krishna)
- Thursday, 16 December 2021 · Guru Pradosh (Shukla)
- Friday, 31 December 2021 · Shukra 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.