The 147th Dublin Horse Show will take place from 18 to 22 August 2021 at the RDS, later than the traditional early August dates to avoid a clash with the rescheduled Tokyo Olympics.
This year's event was cancelled due to ongoing concerns and restrictions around the spread of Covid-19.
Organisers of the Irish showpiece event believe that the early announcement of the change will participants and spectators alike.
Speaking about the new dates and the 2021 staging, RDS chief executive Michael Duffy said: "It was very disappointing to have to cancel this year's show, but it was the most responsible decision that we could take in the circumstances.
"The 147th show will instead take place next year and we are looking forward to the 100,000 visitors that the show attracts over the five days. The show is considered one of the best in the world and is also vital to the Irish sport horse industry and the community.
"However, the health and safety of our visitors, and of the general public, will continue to be of paramount concern for the RDS. Because of this, we will continue to monitor Covid-19 developments for the foreseeable future."