Rosh Hashanah begins on the first day of which Hebrew month?

Rosh Hashanah begins on the first day of the Hebrew month of Tishrei.

Tishrei is the seventh month when the Hebrew calendar’s months are counted from Nisan, the spring month associated with Passover. Rosh Hashanah nevertheless marks the beginning of the civil year and is traditionally associated with the anniversary of humanity’s creation.

The holiday begins at sunset before 1 Tishrei because Hebrew calendar days start in the evening. It is followed by the Ten Days of Repentance, which culminate in Yom Kippur on 10 Tishrei.

A common mix-up is Nisan: it is the first month in the biblical or ecclesiastical numbering system, but Rosh Hashanah does not begin there. Elul is the preceding month, while Kislev falls later in the Hebrew year.