2030
- Tuesday, 1 January 2030 · Bhauma Pradosh (Krishna)
- Thursday, 17 January 2030 · Guru Pradosh (Shukla)
- Thursday, 31 January 2030 · Guru Pradosh (Krishna)
- Friday, 15 February 2030 · Shukra Pradosh (Shukla)
- Friday, 1 March 2030 · Shukra Pradosh (Krishna)
- Sunday, 17 March 2030 · Ravi Pradosh (Shukla)
- Sunday, 31 March 2030 · Ravi Pradosh (Krishna)
- Monday, 15 April 2030 · Soma Pradosh (Shukla)
- Monday, 29 April 2030 · Soma Pradosh (Krishna)
- Wednesday, 15 May 2030 · Budha Pradosh (Shukla)
- Wednesday, 29 May 2030 · Budha Pradosh (Krishna)
- Thursday, 13 June 2030 · Guru Pradosh (Shukla)
- Friday, 28 June 2030 · Shukra Pradosh (Krishna)
- Friday, 12 July 2030 · Shukra Pradosh (Shukla)
- Saturday, 27 July 2030 · Shani Pradosh (Krishna)
- Sunday, 11 August 2030 · Ravi Pradosh (Shukla)
- Monday, 26 August 2030 · Soma Pradosh (Krishna)
- Monday, 9 September 2030 · Soma Pradosh (Shukla)
- Wednesday, 25 September 2030 · Budha Pradosh (Krishna)
- Tuesday, 8 October 2030 · Bhauma Pradosh (Shukla)
- Thursday, 24 October 2030 · Guru Pradosh (Krishna)
- Thursday, 7 November 2030 · Guru Pradosh (Shukla)
- Saturday, 23 November 2030 · Shani Pradosh (Krishna)
- Saturday, 7 December 2030 · Shani Pradosh (Shukla)
- Sunday, 22 December 2030 · Ravi Pradosh (Krishna)
2031
- Sunday, 5 January 2031 · Ravi Pradosh (Shukla)
- Monday, 20 January 2031 · Soma Pradosh (Krishna)
- Tuesday, 4 February 2031 · Bhauma Pradosh (Shukla)
- Wednesday, 19 February 2031 · Budha Pradosh (Krishna)
- Thursday, 6 March 2031 · Guru Pradosh (Shukla)
- Thursday, 20 March 2031 · Guru Pradosh (Krishna)
- Saturday, 5 April 2031 · Shani Pradosh (Shukla)
- Saturday, 19 April 2031 · Shani Pradosh (Krishna)
- Sunday, 4 May 2031 · Ravi Pradosh (Shukla)
- Sunday, 18 May 2031 · Ravi Pradosh (Krishna)
- Tuesday, 3 June 2031 · Bhauma Pradosh (Shukla)
- Tuesday, 17 June 2031 · Bhauma Pradosh (Krishna)
- Wednesday, 2 July 2031 · Budha Pradosh (Shukla)
- Wednesday, 16 July 2031 · Budha Pradosh (Krishna)
- Thursday, 31 July 2031 · Guru Pradosh (Shukla)
- Friday, 15 August 2031 · Shukra Pradosh (Krishna)
- Saturday, 30 August 2031 · Shani Pradosh (Shukla)
- Sunday, 14 September 2031 · Ravi Pradosh (Krishna)
- Sunday, 28 September 2031 · Ravi Pradosh (Shukla)
- Monday, 13 October 2031 · Soma Pradosh (Krishna)
- Monday, 27 October 2031 · Soma Pradosh (Shukla)
- Wednesday, 12 November 2031 · Budha Pradosh (Krishna)
- Wednesday, 26 November 2031 · Budha Pradosh (Shukla)
- Friday, 12 December 2031 · Shukra Pradosh (Krishna)
- Friday, 26 December 2031 · Shukra 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.