Israel had been preventing vast crowds of Palestinians from using a coastal road to return to northern Gaza, accusing Hamas of violating the truce agreement by failing to release civilian women hostages.
As the ceasefire took effect on Sunday morning, thousands of displaced, war-weary Palestinians set off across the devastated Gaza Strip to return home.
Israeli Prime Minister Benjamin Netanyahu said the deal's final details were still being worked on, but he thanked Biden for "promoting" it. Hamas leader Khalil al-Hayya said it was the result of Palestinian "resilience".
Officials from mediators Qatar, Egypt and the US as well as Israel and Hamas said an agreement for a truce in the besieged enclave and release of hostages was closer than ever.
Iran strongly condemned on Thursday an "insulting" poster on a bus in a French city depicting supreme leader Ayatollah Ali Khamenei, state media reported, with relations strained between the two countries.
