Rafi at Life in Israel shares this event notice...
Visit the kever (the holy tomb) of Yehoshua bin Nun (Joshua, who took over after the passing of Moshe Rabaynu (Moses)) on Wednesday April 30th at night. Open from 11:00pm until 5:00am (and then davening at 5:30am).
It should be noted that the reason this is a rare event and in the middle of the night, is that the holy tomb is located in the middle of a current Arab village in the Shomron (West Bank). The army will escort everyone in and provide heavy security. The local hostile residents will be under curfew during this time.
BS"D - בסיעתא דשמיא