NASA is still aiming to launch at 6.24pm EDT (11.24pm GMT) on April 1. If this date is missed due to unfavourable weather conditions or other issues, there are additional opportunities for launch up to April 6. The rocket was set to launch in February, but a helium leak was discovered, and it had to return to the Vehicle Assembly Building in Cape Canaveral for repairs.
Article source: https://www.express.co.uk/news/science/2187385/artemis-2-launch-countdown-released