April 1: The Hebrew University Dedicated on Mount Scopus, Jerusalem, with Lord Balfour present. Jabotinsky supports institution's founding for teaching sciences, not exclusively for research.

April 28: Jabotinsky calls for world boycott of Germany, in response to anti-Semitic policy, and for Jewish state in Eretz Israel, as sole response to Hitler and his allies.

April 19: Warsaw Ghetto Uprising erupts. Jewish Military Union, commanded by Avraham Frenkel, and Jewish Fighting Organization , commanded by Mordechai Anielewicz, fire on German forces penetrating the ghetto

April 13: Arab rioters ambush convoy on way to Mount Scopus, Jerusalem. 78 doctors, nurses, medical staff, university staff, scientists, researchers, students and escorts murdered.

April 1: Kingdom of Jordan signs ceasefire agreement with Israel in Rhodes, Greece. Moshe Dayan signs for Israel, following similar ceasefire agreement with Egypt and Lebanon.

April 11: Trial of Nazi Adolf Eichmann begins in Jerusalem, responsible for implementing "Final Solution" to annihilate the Jews. Brought to Israel by Mossad from Argentina, tried and sentenced to hanging.

April 12: Gush Emunim group, led by Rabbi Moshe Levinger, initiate Jewish resettlement in Hebron, the patriarchal city. Following Seder Pesach 5728 (1968), they remain to live there.

April 1: Agranat Commission, investigating Yom Kippur War failures, assigns responsibility at military level. Those at the political level are exonerated.

April 14: Reuven Hecht dies (84). Among Jabotinsky faithful, illegal immigration activist, philanthropist, entrepreneur, Dagon Granaries founder, Israel Prize recipient, 1988, personal advisor to Menachem Begin.