My father passed away last year and the first anniversary falls in June2013.
Some say I should start doing tharpanam on ammavasya ; while others say
tharpanam should be done after the first anniversary; I have seen my father doing
tharpanam after first anniversary only.
what is right as per sastram and what is its pramanam?
Could any one clarify with authoritative texts?

rgds
vaidyanathan

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