What holiday follows ten days after Rosh Hashanah?

The holiday that follows ten days after Rosh Hashanah is Yom Kippur.

Rosh Hashanah begins the Ten Days of Repentance, also called the Ten Days of Awe, and Yom Kippur brings that period to its culmination. Yom Kippur is known as the Day of Atonement and is the holiest day in the Jewish year. It is devoted to fasting, prayer, repentance, and seeking forgiveness.

Both holidays fall in the Hebrew month of Tishrei: Rosh Hashanah begins on the first day, while Yom Kippur is observed on the tenth. In everyday descriptions, Yom Kippur is said to occur ten days after Rosh Hashanah; more precisely, it falls on Tishrei 10, after the intervening days of the repentance period.

This relationship explains why the two holidays are often discussed together. Rosh Hashanah is associated with judgment and the opening of the season, while Yom Kippur is its solemn conclusion. Sukkot follows later in Tishrei, and Passover belongs to the spring month of Nisan, so neither is the immediate ten-day counterpart.