Art Basel, the centerpiece of Europe’s summer art market calendar, has postponed its June edition in Switzerland until September as a result of the coronavirus pandemic.

Health concerns permitting, the 50th Art Basel will now take place Sept. 17-20, with preview days on Sept. 15-16. More than 280 galleries from 35 countries are slated to participate.

“We thank our galleries for the support and understanding of our highly complex decision to postpone the fair,” Marc Spiegler, global director of Art Basel, said in a statement Thursday. “We hope that the situation improves swiftly, and we will work closely with our exhibitors to deliver a successful fair in September.”

The event will now take place just two weeks before Frieze London, Europe’s other main destination contemporary art fair, and four weeks before FIAC in Paris.