2030
Saturday, 19 October 2030
In 2030 the tithi runs from 7:19 am on 19 Oct to 9:12 am on 20 Oct; it is running at pradosh, the twilight just after sunset on Saturday, 19 October 2030, so that is the day of Ahoi Ashtami.
2031
Friday, 7 November 2031
In 2031 the tithi runs from 11:19 pm on 6 Nov to 1:41 am on 8 Nov; it is running at pradosh, the twilight just after sunset on Friday, 7 November 2031, so that is the day of Ahoi Ashtami.
How the date is fixed
Ahoi Ashtami falls on the eighth day of the dark half of the lunar month Ashwina (Krishna Ashtami). The date is the day on which that tithi is running at pradosh, the twilight just after sunset. In the North Indian (purnimanta) calendar the same fortnight is counted in Kartika.
About
Ahoi Ashtami falls on the eighth tithi of the dark half of Ashwina in amanta reckoning (Kartika Krishna Ashtami in the north), four days after Karwa Chauth and eight before Diwali, in October or November. The fast is broken in the evening at the first sighting of stars, so the day whose dusk carries Ashtami is chosen. An image of Ahoi Mata is drawn or hung on the wall and the story told before the stars appear. It is kept in the same belt as Karwa Chauth and often by the same households.
How it is observed
A day-long fast by mothers, the Ahoi story at dusk, and water offered to the stars before eating.