A big trip to the Moon is not now. It will not go in March. This is a special trip. People will go near the Moon. It is the first time in many years.
The big rocket has a problem. It needs helium for its engines. Some people found this problem. They must fix the rocket.
The people in charge say March is not good. They will try for April. Maybe early April. Or maybe late April.
This trip is for another trip. That trip will put people on the Moon. This will be in some years.
Space trips are hard. Being safe is very important. Fixing the rocket is key. This keeps people safe.