[Avodah] Dechiyot

[Simon Montagu]

On 12/28/06, Zev Sero <zev at sero.name> wrote:
> Only if you apply the ADU rule before Molad Zaken, and count a MZ only
> when you haven't already applied ADU.  It makes more sense to me to
> apply MZ first, and ADU last, because MZ often triggers ADU, and GTRD
> *always* does.
>

Logic is on your side, but the order that I have usually seen the
application of the dehhiyot described is IDO, MZ, GTRD, and BTUTKPT,
and rather than saying that a year with MZ on Shabbat, Tuesday or
Thursday has both MZ and IDO, it is counted as MZ causing a 2 day
dehiya, and the same for GTRD.