1997
- Monday, 6 January 1997 · Soma Pradosh (Krishna)
- Monday, 20 January 1997 · Soma Pradosh (Shukla)
- Wednesday, 5 February 1997 · Budha Pradosh (Krishna)
- Wednesday, 19 February 1997 · Budha Pradosh (Shukla)
- Thursday, 6 March 1997 · Guru Pradosh (Krishna)
- Friday, 21 March 1997 · Shukra Pradosh (Shukla)
- Saturday, 5 April 1997 · Shani Pradosh (Krishna)
- Sunday, 20 April 1997 · Ravi Pradosh (Shukla)
- Sunday, 4 May 1997 · Ravi Pradosh (Krishna)
- Monday, 19 May 1997 · Soma Pradosh (Shukla)
- Monday, 2 June 1997 · Soma Pradosh (Krishna)
- Wednesday, 18 June 1997 · Budha Pradosh (Shukla)
- Wednesday, 2 July 1997 · Budha Pradosh (Krishna)
- Thursday, 17 July 1997 · Guru Pradosh (Shukla)
- Thursday, 31 July 1997 · Guru Pradosh (Krishna)
- Saturday, 16 August 1997 · Shani Pradosh (Shukla)
- Saturday, 30 August 1997 · Shani Pradosh (Krishna)
- Sunday, 14 September 1997 · Ravi Pradosh (Shukla)
- Sunday, 28 September 1997 · Ravi Pradosh (Krishna)
- Monday, 13 October 1997 · Soma Pradosh (Shukla)
- Tuesday, 28 October 1997 · Bhauma Pradosh (Krishna)
- Wednesday, 12 November 1997 · Budha Pradosh (Shukla)
- Thursday, 27 November 1997 · Guru Pradosh (Krishna)
- Thursday, 11 December 1997 · Guru Pradosh (Shukla)
- Saturday, 27 December 1997 · Shani Pradosh (Krishna)
1998
- Saturday, 10 January 1998 · Shani Pradosh (Shukla)
- Sunday, 25 January 1998 · Ravi Pradosh (Krishna)
- Sunday, 8 February 1998 · Ravi Pradosh (Shukla)
- Tuesday, 24 February 1998 · Bhauma Pradosh (Krishna)
- Tuesday, 10 March 1998 · Bhauma Pradosh (Shukla)
- Wednesday, 25 March 1998 · Budha Pradosh (Krishna)
- Thursday, 9 April 1998 · Guru Pradosh (Shukla)
- Friday, 24 April 1998 · Shukra Pradosh (Krishna)
- Friday, 8 May 1998 · Shukra Pradosh (Shukla)
- Saturday, 23 May 1998 · Shani Pradosh (Krishna)
- Sunday, 7 June 1998 · Ravi Pradosh (Shukla)
- Sunday, 21 June 1998 · Ravi Pradosh (Krishna)
- Tuesday, 7 July 1998 · Bhauma Pradosh (Shukla)
- Tuesday, 21 July 1998 · Bhauma Pradosh (Krishna)
- Wednesday, 5 August 1998 · Budha Pradosh (Shukla)
- Wednesday, 19 August 1998 · Budha Pradosh (Krishna)
- Friday, 4 September 1998 · Shukra Pradosh (Shukla)
- Thursday, 17 September 1998 · Guru Pradosh (Krishna)
- Saturday, 3 October 1998 · Shani Pradosh (Shukla)
- Saturday, 17 October 1998 · Shani Pradosh (Krishna)
- Monday, 2 November 1998 · Soma Pradosh (Shukla)
- Monday, 16 November 1998 · Soma Pradosh (Krishna)
- Tuesday, 1 December 1998 · Bhauma Pradosh (Shukla)
- Wednesday, 16 December 1998 · Budha Pradosh (Krishna)
- Wednesday, 30 December 1998 · Budha 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.