Independence Days by FlaxmanR

Question 10

Israel became an independent nation on 5 Iyar 5708. The holiday marking this day, Yom Ha’atzmaut, is celebrated between April 15 and May 15 depending on how the Hebrew calendar lines up with the Gregorian, making it the world’s only non-fixed Independence Day as far as your smith could tell. But in WHAT YEAR ON THE GREGORIAN CALENDAR did Israel’s independence take place?