"We have made a decision that the ceasefire will begin this Tuesday, May 12, at 11.00 pm and will last for five days subject to renewal if it works out," Adel al-Jubeir said at a meeting of Gulf ministers in Paris.
Speaking at a press conference alongside US Secretary of State John Kerry, al-Jubeir said the success of the ceasefire hinged on the Huthis and their allies.
"The ceasefire will end should Huthis or their allies not live up to the agreement -- this is a chance for the Huthis to show that they care about their people and they care about the Yemen people," al-Jubeir added.
Kerry said the ceasefire would take place "provided that the Huthi agree that there will be no bombing, no shooting, no movement of their troops or manoeuvring to reposition for military advantage (and) no movement of heavy weapons".
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He added: "The ceasefire is conditional on the Huthis agreeing to live by these commitments."
There were indications that the Huthis would agree to the ceasefire, he said, explaining that the date was chosen to give the Huthis time to give orders to their fighters in the field.
He stressed that the pause in hostilities was a "renewable commitment" that, if it held, "opens the door to possibility of an extension".
"This is an important moment," he said, and anyone who cares about Yemen "should take clear notice of the fact that a humanitarian catastrophe is building", with signs the country was running out of food, medicine and fuel.
Without mentioning them by name, Kerry also urged the countries "that have the greatest influence" on the Yemenis -- meaning Iran and Russia -- "to encourage them to take advantage of this moment".