SpaceX has narrow window for Ax-2 launch

paceX and Axiom Space will have only two opportunities this month to launch a private astronaut mission to the International Space Station before having to wait potentially several months before getting another shot. At a May 15 briefing, officials from the two companies as well as NASA announced they had completed a flight readiness review for the Ax-2 mission to the station, giving their approval to proceed with a May 21 launch. Liftoff of the Falcon 9 carrying the Crew Dragon spacecraft is scheduled for 5:37 p.m. Eastern that day, setting up a docking May 22 at 9:30 a.m. Eastern. More

(Source: SpaceNews - May 17)