Annual shraddha Thivasam, the yearly remembrance. It falls on the day the tithi of the death runs again in the lunar month the death fell in — not on the English anniversary, which is why the date moves by ten or eleven days each year.

The place is where the rite is kept, not necessarily where the death happened: the day turns on that place's sunrise and on the hour of its afternoon. When the hour of the death is not known, the tithi is read at sunrise of that date, which is the tithi the day itself carries and the one a wall calendar prints against it.

Enter the date of the death.