Shulchan Aruch Orach Chaim 620 says that one should daven Musaf before the seventh hour of the day on Yom Kippur even if it means leaving out Piyutim and Selichos of Shachris. Mishna Berura says to ...
Generally speaking, Birkat Kohanim can/is done at any daytime prayer. We do not do so at mincha because in the afternoon people have already eaten and the kohanim may have drunk some alcohol which ...
Recently I saw in Halacha that it is inappropriate to have the sermon right before Kaddish of Musaf as it is considered a Hefsek. Yet many Shuls do just that and have the sermon right before Kaddish ...