On which Hebrew month does Yom Kippur fall?

Yom Kippur falls in the Hebrew month of Tishrei, specifically on the tenth day of the month. In the Gregorian calendar, it usually arrives in September or October because the Hebrew calendar is lunisolar.

Tishrei is the first month of the civil Hebrew year, although it is counted as the seventh month in the biblical religious calendar. Its opening day is Rosh Hashanah, so Yom Kippur follows nine days later. Together, these holidays form part of the High Holy Days, a season of reflection and repentance.

The other options belong to the Hebrew calendar but are not the month of Yom Kippur. Nisan is associated with Passover, Sivan with Shavuot, and Elul with the preparatory period before Rosh Hashanah. This makes the question a calendar-location test rather than a translation question.

Because Jewish days begin at sunset, Yom Kippur starts on the evening before the civil-calendar date of 10 Tishrei and ends after nightfall on the following day. The exact Gregorian date changes from year to year.