There are certain instances that amavasya starts from 7 am and ends the next day by 6/15 am. In this case on which day to do the amavasya tharpanam? The previous day it starts from 7 am that is one hour [assume the sun rise at 6 am] after sunrise. The next day it ends by 6/15 am where the thithi is there during sunrise. Normally tharpanam to be performed by 11 am but now due to office workings it is done by 8 am. In the above case on which day the tharpanam for pithrus to be done?