Rosh Hashanah - New Year

The Torah ( Jewish Bible) does not use the term “Rosh Hashanah,” but calls this holiday Yom Teruah, The Day of the Sounding of the Shofar. According to Leviticus 23:23-25, it was to be celebrated by blowing a shofar, or ram’s horn, by resting from all work, and by calling a holy assembly, and presenting an offering

Leviticus 23:23-25
The Feast of Trumpets
23 And the Lord spoke to Moses, saying,
24 “Speak to the people of Israel, saying, In the seventh month, on the first day of the month, you shall observe a day of solemn rest, a memorial proclaimed with blast of trumpets, a holy convocation.
25 You shall not do any ordinary work, and you shall present a food offering to the Lord.”