What is Rosh Hashanah? History.com's Ask a Rabbi series describes and defines this most important Jewish Holiday. Learn about the customs associated with Rosh Hashanah including the blowing of the ram's horn.

FACT CHECK: We strive for accuracy and fairness. But if you see something that doesn't look right, click here to contact us! HISTORY reviews and updates its content regularly to ensure it is complete and accurate.

RELATED CONTENT

What is Hanukkah? History.com's Ask a Rabbi explains Hanukkah and this Jewish holiday's customs. Learn about the menorah, dreidel and other items that have become part of the Jewish holiday Hanukkah.

Rosh Hashanah is the first of ten Jewish high holy days ending with Yom Kippur.

Ramadan is the most holy Islamic holiday.

Discover the roots of Kwanzaa and how it became an African American holiday.

Hanukkah celebrates the triumph of Jewish people over religious persecution.

Take a look at the holiday marking the official beginning of summer and America's most solemn occasion.