Aliyah Day, also known as Yom HaAliyah, is an official holiday observed in Israel on 10 Nisan, with school celebrations occurring on 7 Cheshvan. It commemorates the immigration of Jews from the diaspora to the Land of Israel, a key concept in the Zionist movement. The holiday's origin is linked to the biblical account in the Book of Joshua, marking the Israelites' crossing of the Jordan River into the Promised Land, which is considered the first documented "mass aliyah." Aliyah Day began as a grassroots initiative in 2012 and was officially established by the Knesset in 2016. The Law of Return, enacted in 1950, enshrined the right of Jews to immigrate and gain citizenship in Israel, further solidifying the significance of this day. Celebrations typically include educational activities in schools, reflecting on the historical and cultural importance of Jewish immigration to Israel.