No single official dress code is published for the Holy Sepulchre; the Christian Information Centre lists hours, not clothing rules, and the Custody's practice is the usual Catholic one, with signs at church doors asking for modest dress. Groups are refused at the door if someone arrives in shorts or a sleeveless top, so the safe rule is the one above every day, not just on church days. At the Western Wall men cover their heads (paper kippot are provided) and the sexes pray in separate sections. The Dome of the Rock and al-Aqsa are closed to non-Muslims, and the Temple Mount esplanade has restricted visiting hours for everyone else; a guide handles that.
The climate drives the rest. In summer, light long-sleeved shirts and a hat protect better than bare arms. In winter Jerusalem is cold and wet while Jericho and the Dead Sea are mild, so layers and a packable rain shell cover both in one day. Swimwear and water shoes are useful at the Dead Sea; a towel for a Jordan River renewal of baptismal promises, where white garments are often provided by the site.
Bring a copy of the passport photo page separate from the passport, since Israeli checkpoints and the Bethlehem crossing check it, and any medication in its original packaging. Carrying a rosary, a small Bible or daily missal and a notebook is what most pilgrims actually use. Electrical outlets are European two-pin at 230 volts. Confirm the group's own packing list, since operators sometimes add items for specific Masses or walks.