[Avodah] bat mitzva "bo bayom"

[Akiva Blum]

From: menucha 
>>>
I am wondering if there is an inyan to have a seudat bat mitzva
(obviously for those who hold that a seudat bat mitzva is a seudat
mitzva) on the actual birthday. My feeling is that since there's not
much else the girl can do on that day to show her reacing mitzvot (yes,
I know she can take challah, or tovel dishes etc.- ) that it seems more
important to have the seuda on the actual day, but i'd like to hear
other peoples reactions and sources.
<<<

Actually, a girl can tovel dishes before she is bas mitzvah. She isn't chayeves, and isn't believed if she did (SO YD 120:14) but she can do it. Similarly, she can take trumos umaasros as long as she has reached onas hanedorim (SO YD 331:33). There's nothing in doing them to show that she is already bas mitzvah.

Akiva