Which war is named after Yom Kippur?

The war named after Yom Kippur is the Yom Kippur War.

The conflict began on October 6, 1973, when Egypt and Syria launched a surprise attack against Israel. The date coincided with Yom Kippur, Judaism’s holiest day, and with the Muslim month of Ramadan. The war is therefore also known as the 1973 Arab–Israeli War, the October War, or the Ramadan War.

Egyptian forces crossed the Suez Canal into the Sinai Peninsula, while Syrian forces attacked across the Golan Heights. Both areas had been captured by Israel during the Six-Day War of 1967. Israel eventually regained the initiative, but the fighting exposed the limits of its assumption that the 1967 victory guaranteed future military dominance.

The war ended with ceasefires on October 22 and October 25. Its political consequences were lasting: negotiations eventually helped produce the 1978 Camp David Accords and the 1979 Egypt–Israel peace treaty, under which Israel returned the Sinai to Egypt.