If someone by mistake didn't say atah y'ztarteh (the special tefillah we say by musaf on Shabbos that is also rosh chodesh) and instead davened a regular musaf on shabbos rosh chdoesh, what's the din ...
If a person forgets to say yaaleh vyavo for rosh chodesh during the shemonah esre, I understand they are supposed to go back and repeat the shemonah esre, this time saying yaaleh vyavo. Is there a ...
On Rosh Chodesh we have four aliyos by Krias HaTorah. Rosh Chodesh fell out on Monday and by mistake it was read by the first aliyah of Kohen the Parsha of that week. After the aliyah was finished ...