In the current system, Yom ha’Atzmaut is only observed on Iyor 5th when it is a Wednesday [Happens in years when R’H shall be Shabbos].
When Iyor 5th is Shabbos, Yom ha’Atzmaut is Mukdom to Thursday Iyor 3rd.
When Iyor 5th is Friday, Yom ha’Atzmaut is Mukdom to Thursday Iyor 4th.
When Iyor 5th is Monday, Yom ha’Atzmaut id Nidche to Tuesday Iyor 6th, so that Yom haZikoron does not come out in juxtoposition to Shabbos, and hence is held off until Sunday nite.