Based on my research, I can verify this claim:

Reasoning:

• NASA's Artemis II mission is indeed scheduled for 2026, with a targeted launch date of April 1, 2026¹²³
• The mission countdown began on March 30, 2026, with the onsite countdown clock starting at 4:44 p.m. EDT toward a targeted launch time of 6:24 p.m. on Wednesday, April 1, 2026³
• Previous launch windows in February and March 2026 were scrubbed due to technical issues, including problems with helium flow to the rocket's upper stage and issues during wet dress rehearsals²
• NASA has published an official "Artemis II Mission Availability – April 2026" document showing launch opportunities throughout April 2026⁴
• Artemis II is the first crewed launch of NASA's SLS (Space Launch System) rocket and Orion spacecraft, carrying four astronauts on a 10-day mission around the Moon and back³

Overall validity: 100%

1. NASA Releases Artemis II Moon Mission Launch Countdown
2. NASA Artemis II launch dates | BBC Sky at Night Magazine
3. NASA's Artemis II Launch Mission Countdown Begins
4. [PDF] artemis ii mission availability – april 2026 | nasa