The festival celebrated on the first day of the month of Tishri (September/October), the seventh month of the Jewish calendar. Basic regulations for the observance of the New Year Festival appear in (Lev 23:23-25 and Num 29:1-6). Since Tishri is not actually the first month of the year, it seems likely that the biblical New Year Festival was originally a harvest celebration associated with the Day of Atonement (Lev 23:26-32; Num 29:7-11) and the Festival of Tabernacles (Booths).
Lev 23:23-25
The Festival of Trumpets
23The Lord spoke to Moses, saying:24Speak to the people of Israel, saying: In the seventh month, on the first day of the month, you sha ... View more
Num 29:1-6
Offerings at the Festival of Trumpets
1On the first day of the seventh month you shall have a holy convocation; you shall not work at your occupations. It is a ... View more
Lev 23:26-32
The Day of Atonement
26The Lord spoke to Moses, saying:27Now, the tenth day of this seventh month is the day of atonement; it shall be a holy convocation for yo ... View more
Num 29:7-11
Offerings on the Day of Atonement
7On the tenth day of this seventh month you shall have a holy convocation, and deny yourselves; you shall do no work.8You shal ... View more