[Avodah] Bar Mitzvah on "Early Shabbos"

[David Riceman]

RJR:
> : Wouldn't it be talui in the machloket as to whether accepting early
> : shabbos literally turns Friday night into shabbat or is it just accepting
> : some additional obligations/restrictions on Friday?
>   
RMB:
> I also thought of the oft-rehashed Brisker Torah on Sukkos and tosefes
> Shemini Atzeres, often the same discussion. As well as the role of tosefes
> YT on qiddush beleil seder. (You are yotzei qiddush, but not 4 kosos
> which requires zeman achilas haqorban, not just that it be Pesach.)
>
> The Taz is choleiq with the Maharshal. The Maharshal cites the practice
> of a R' Tevil who wouldn't eat on Shemini Atzeres so as to avoid
> making a berakhah leisheiv basukah before qiddush for SA. The Tax holds
> that tosefes qodesh is a de'Oraisa and makes it the neft day, "for him
> the previous day along with any of its halachic obligations has passed.
> And it is as if it is night and actually the next day."
>
> And as with 4 kosos, Shema and omer require night, not the next day, and
> therefore the Taz says are not impacted by tosefes.
>   
"Literally Shabbat" requires korban/misah as a penalty for violating 
it.  None of these opinions goes that far.  Does anyone? IIRC even 
violating tosefes Yom Kippur, which everyone agrees is d'oraysa, is 
merely an issur asei and not a hiyyuv kores.

David Riceman