NASA astronauts Sunita Williams and Butch Wilmore are returning to Earth on March 18, after over nine months on the ISS. They’ll splash down off Florida at 5:57 pm (21:57 GMT), marking the end of their extended mission.

NASA removed two astronauts from its Crew-9 mission to allow for Williams and Wilmore to join the cohort, and return onboard the SpaceX Dragon − which carries four people at a time. The altered Crew-9 − only Hague and Gorbunov − launched aboard the SpaceX Dragon Freedom in late September.