Take the 2-minute tour ×  When is the Musaf said? I know it is
part of the Shacharit service. I mean when as in what holidays,
fast days, etc... Would you say it on Tisha B'av for example. If
not, why?  At the end of the Torah reading of Pinchas, we read
about the additional sacrifices that were offered in the Temple
on special days. These additional sacrifices are called musaf
(in the singular) or musafin (in the plural), meaning
"additions," and they were offered on Shabbat, Rosh Chodesh,
Passover, Shavuot, Rosh Hashanah, Yom Kippur, and Sukkot, as
well as on the intermediate days (Chol Hamoed) of Passover and
Sukkot.  Are the holidays listed the only times you would do
musaf?  share|improve this question  1 Answer 1  up vote 5 down
vote accepted  The red-letter days listed in your question are,
indeed, the only times we say it, and for the reason you quote:
because those are the days the musaf sacrificial offerings were
offered to God in the Temple back in the good old days. See
Numbers chapters 2829.  sha