The Goodwood Members' Meeting has been postponed until April 2021 in the wake of the coronavirus pandemic.
The 78th edition of the historic event was due to take place on 28-29 March this year but was postponed due to the growing coronavirus crisis.
It was hoped an alternative date could be found later in the year but organisers have now taken the decision to delay the event until 2021.
A new provisional date has been given of 10-11 April 2021.
In a statement, Goodwood said: "With social distancing measures set to continue through the summer, it has become clear that significant compromises would have to be made in order to hold the 78th Members' Meeting later in 2020 - compromises which would have risked losing what makes it so special to so many people."
The racing content originally planned for this year is still due to form part of the rescheduled fixture next season - including a two-part SF Edge Trophy contest for Edwardian machines and two heats and a final for Group 1 saloons contesting the Gerry Marshall Trophy.
All 2020 Members' Meeting tickets will roll over to next year.
The Duke of Richmond added: "We were very sad to postpone the 78th Members' Meeting in March this year, but were confident that it was the right thing to do to protect our visitors, competitors and staff.
"The 78th Members' Meeting will be our best yet, and we are already working to see how we can add to the spectacular racing we had planned.
"I know that our many fans of the Festival of Speed and the Goodwood Revival are keen to know how and when their favourite motorsport events will be taking place, and we are exploring a range of options to host events again as soon as we can."