The new attempt to launch the Artemis 1 mission to the Moon will take place on Saturday.
This was announced by Mike Sarafin, head of the mission, during a briefing with the media.
After the attempt canceled two days ago, NASA initially identified a new window for September 2.
The unmanned flight, fifty years after the last Apollo mission, is therefore scheduled for 3 September.
The first launch attempt on 29 August was canceled because a test to bring one of the rocket's four RS-25 engines to the correct temperature was unsuccessful.
Artemis 1's goal, named after the Apollo twin sister, is to test the 322-foot (98-meter) Space Launch System rocket and Orion crew capsule.
The mission is unmanned: mannequins equipped with sensors replace the astronauts and record the levels of acceleration, vibrations and radiation.
Tens of thousands of people, including United States Vice President Kamala Harris, gathered to watch the launch, which takes place 50 years after Apollo 17 astronauts last set foot on the moon.