900. Oseh HaShalom

129:6 At the end of the Shemoneh Esrei, some conclude with “Oseh hashalom” (“the One Who makes the peace”), while others do not change the text and conclude with the usual “haMevareich es amo Yisroel b’shalom” (“the One Who blesses His people Israel with peace”). In kaddish, however,  they do say “Oseh hashalom” (as opposed to “Oseh shalom”).

129:7 If Rosh Hashana falls on Shabbos, some places say “L’chu n’ran’n'na” (Psalm 95) on Friday night as on a regular Shabbos. Other places start from “Mizmor l’David’ (Psalm 29), while still others start from “Mizmor shir l’yom haShabbos” (Psalm 92). Each place should act according to their own practice.