2039
- Friday, 7 January 2039 · Shukra Pradosh (Shukla)
- Saturday, 22 January 2039 · Shani Pradosh (Krishna)
- Sunday, 6 February 2039 · Ravi Pradosh (Shukla)
- Sunday, 20 February 2039 · Ravi Pradosh (Krishna)
- Tuesday, 8 March 2039 · Bhauma Pradosh (Shukla)
- Tuesday, 22 March 2039 · Bhauma Pradosh (Krishna)
- Wednesday, 6 April 2039 · Budha Pradosh (Shukla)
- Wednesday, 20 April 2039 · Budha Pradosh (Krishna)
- Friday, 6 May 2039 · Shukra Pradosh (Shukla)
- Friday, 20 May 2039 · Shukra Pradosh (Krishna)
- Saturday, 4 June 2039 · Shani Pradosh (Shukla)
- Saturday, 18 June 2039 · Shani Pradosh (Krishna)
- Sunday, 3 July 2039 · Ravi Pradosh (Shukla)
- Monday, 18 July 2039 · Soma Pradosh (Krishna)
- Tuesday, 2 August 2039 · Bhauma Pradosh (Shukla)
- Wednesday, 17 August 2039 · Budha Pradosh (Krishna)
- Wednesday, 31 August 2039 · Budha Pradosh (Shukla)
- Thursday, 15 September 2039 · Guru Pradosh (Krishna)
- Thursday, 29 September 2039 · Guru Pradosh (Shukla)
- Saturday, 15 October 2039 · Shani Pradosh (Krishna)
- Saturday, 29 October 2039 · Shani Pradosh (Shukla)
- Sunday, 13 November 2039 · Ravi Pradosh (Krishna)
- Sunday, 27 November 2039 · Ravi Pradosh (Shukla)
- Tuesday, 13 December 2039 · Bhauma Pradosh (Krishna)
- Tuesday, 27 December 2039 · Bhauma Pradosh (Shukla)
2040
- Wednesday, 11 January 2040 · Budha Pradosh (Krishna)
- Thursday, 26 January 2040 · Guru Pradosh (Shukla)
- Friday, 10 February 2040 · Shukra Pradosh (Krishna)
- Saturday, 25 February 2040 · Shani Pradosh (Shukla)
- Saturday, 10 March 2040 · Shani Pradosh (Krishna)
- Monday, 26 March 2040 · Soma Pradosh (Shukla)
- Monday, 9 April 2040 · Soma Pradosh (Krishna)
- Tuesday, 24 April 2040 · Bhauma Pradosh (Shukla)
- Tuesday, 8 May 2040 · Bhauma Pradosh (Krishna)
- Thursday, 24 May 2040 · Guru Pradosh (Shukla)
- Wednesday, 6 June 2040 · Budha Pradosh (Krishna)
- Friday, 22 June 2040 · Shukra Pradosh (Shukla)
- Friday, 6 July 2040 · Shukra Pradosh (Krishna)
- Saturday, 21 July 2040 · Shani Pradosh (Shukla)
- Sunday, 5 August 2040 · Ravi Pradosh (Krishna)
- Monday, 20 August 2040 · Soma Pradosh (Shukla)
- Monday, 3 September 2040 · Soma Pradosh (Krishna)
- Tuesday, 18 September 2040 · Bhauma Pradosh (Shukla)
- Wednesday, 3 October 2040 · Budha Pradosh (Krishna)
- Wednesday, 17 October 2040 · Budha Pradosh (Shukla)
- Friday, 2 November 2040 · Shukra Pradosh (Krishna)
- Friday, 16 November 2040 · Shukra Pradosh (Shukla)
- Saturday, 1 December 2040 · Shani Pradosh (Krishna)
- Saturday, 15 December 2040 · Shani Pradosh (Shukla)
- Monday, 31 December 2040 · 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.