1999
- Friday, 15 January 1999 · Shukra Pradosh (Krishna)
- Friday, 29 January 1999 · Shukra Pradosh (Shukla)
- Saturday, 13 February 1999 · Shani Pradosh (Krishna)
- Saturday, 27 February 1999 · Shani Pradosh (Shukla)
- Monday, 15 March 1999 · Soma Pradosh (Krishna)
- Monday, 29 March 1999 · Soma Pradosh (Shukla)
- Tuesday, 13 April 1999 · Bhauma Pradosh (Krishna)
- Tuesday, 27 April 1999 · Bhauma Pradosh (Shukla)
- Thursday, 13 May 1999 · Guru Pradosh (Krishna)
- Thursday, 27 May 1999 · Guru Pradosh (Shukla)
- Friday, 11 June 1999 · Shukra Pradosh (Krishna)
- Saturday, 26 June 1999 · Shani Pradosh (Shukla)
- Saturday, 10 July 1999 · Shani Pradosh (Krishna)
- Sunday, 25 July 1999 · Ravi Pradosh (Shukla)
- Monday, 9 August 1999 · Soma Pradosh (Krishna)
- Tuesday, 24 August 1999 · Bhauma Pradosh (Shukla)
- Tuesday, 7 September 1999 · Bhauma Pradosh (Krishna)
- Thursday, 23 September 1999 · Guru Pradosh (Shukla)
- Wednesday, 6 October 1999 · Budha Pradosh (Krishna)
- Friday, 22 October 1999 · Shukra Pradosh (Shukla)
- Friday, 5 November 1999 · Shukra Pradosh (Krishna)
- Sunday, 21 November 1999 · Ravi Pradosh (Shukla)
- Sunday, 5 December 1999 · Ravi Pradosh (Krishna)
- Monday, 20 December 1999 · Soma Pradosh (Shukla)
2000
- Monday, 3 January 2000 · Soma Pradosh (Krishna)
- Tuesday, 18 January 2000 · Bhauma Pradosh (Shukla)
- Wednesday, 2 February 2000 · Budha Pradosh (Krishna)
- Thursday, 17 February 2000 · Guru Pradosh (Shukla)
- Friday, 3 March 2000 · Shukra Pradosh (Krishna)
- Friday, 17 March 2000 · Shukra Pradosh (Shukla)
- Sunday, 2 April 2000 · Ravi Pradosh (Krishna)
- Sunday, 16 April 2000 · Ravi Pradosh (Shukla)
- Monday, 1 May 2000 · Soma Pradosh (Krishna)
- Monday, 15 May 2000 · Soma Pradosh (Shukla)
- Wednesday, 31 May 2000 · Budha Pradosh (Krishna)
- Wednesday, 14 June 2000 · Budha Pradosh (Shukla)
- Thursday, 29 June 2000 · Guru Pradosh (Krishna)
- Thursday, 13 July 2000 · Guru Pradosh (Shukla)
- Friday, 28 July 2000 · Shukra Pradosh (Krishna)
- Saturday, 12 August 2000 · Shani Pradosh (Shukla)
- Sunday, 27 August 2000 · Ravi Pradosh (Krishna)
- Monday, 11 September 2000 · Soma Pradosh (Shukla)
- Monday, 25 September 2000 · Soma Pradosh (Krishna)
- Tuesday, 10 October 2000 · Bhauma Pradosh (Shukla)
- Tuesday, 24 October 2000 · Bhauma Pradosh (Krishna)
- Thursday, 9 November 2000 · Guru Pradosh (Shukla)
- Thursday, 23 November 2000 · Guru Pradosh (Krishna)
- Saturday, 9 December 2000 · Shani Pradosh (Shukla)
- Saturday, 23 December 2000 · Shani 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.