Trump announces Israel and Iran have agreed to ceasefire, set to begin in 6 hours President Donald Trump announced on social media that Israel and Iran have agreed to a complete and total ceasefire, set to begin in approximately 6 hours. The agreement involves two 12-hour ceasefire periods: Iran will initiate the first 12-hour ceasefire. Israel will follow with the second 12-hour ceasefire. After 24 hours, the war will be officially declared ended.