Why did we move yom Haatzmaut a day early this year? 5 Iyyar was on Friday and in Israel most people don’t work anyway. There was no conflict with Shabbat. So why not leave it on the 5 Iyyar?
Yom Ha'atzmaut celebrations don’t stop at sunset. If we celebrate Yom Ha'atzmaut on Friday many of jews will desecrate Shabbat on Friday after sunset.