Yom Yerushalayim (the holy day in 1967 that Jerusalem was liberated from Jordanian occupation and returned to Jewish sovereignty for the first time in almost 2,000 years) should be celebrated across the entire religious spectrum with, at least, a full reading of Hallel (a prayer of thanksgiving, composed of a selection of Psalms, read on certain holy days including the three festivals, Rosh Chodesh (the new month) and Chanukah (when we previously liberated and rededicated the Holy Temple)), with a brahca (indicating the strongest expression of acknowledgement)!
Doing so connects this miracle to God. Not doing so relegates this to a mere military victory. Connecting our renewed relationship with Jerusalem, especially Har HaBayit, the Temple Mount, with the Eternal God underlines and eternalizes this relationship. The refusal in parts of the religious spectrum returns this to the secular/profane/geo-political and almost guarantees that מידה כנגד מידה, midda ka’negged midda, measure for measure, we’ll lose this millennia-dreamed-for return to our roots and to our spiritual center.
Yom Yerushayim Sameach!