A Jewish/Yahwist festival that takes place in September or October.
{"September" means "7th Month" & "October" means "8th Month" even though they are today considered to be our 9th & 10th months -- so many calendar changes!}
"Rosh HaShanah" ("New Year") is a non-Biblical name. The Biblical name is "Shabbatown Zikrown Truwah" ("Sabbath Memorial of Shofars")
24) Tell the Israelites, in the seventh month, on the first day of the month, you must observe a sabbath day of rest, a memorial announced by the blowing of shofars, a sacred gathering.
25) Do not do any regular work, and present an offering to Yahweh.