“Next Year in Jerusalem” is a regular ritual toast at the Jewish holiday of Passover, during the Passover sedar (dinner) which is filled with specific rituals.
It is a wish/prayer that Jerusalem will once again be the home of Jews, and that Passover will be celebrated there “next year.”
Good for Israel, but the winning song is awful, and the singer is extremely GUILTY! The only two things worth remembering from Eurovision are ABBA, the 1974 winners, and Riverdance, the 1994 interval act.
The phrase also refers to Eurovision 2019; since Israel won, it automatically gets to host the next contest in Jerusalem.
Last contests held in Israel were in 1979 and 1999. The 2019 Eurovision will be the third time Israel has hosted it.