ESNZ chief executive Vicki Glynn welcomed the move, which, she said, had been decided on after consultation with the many groups affected by the date change.
"We have consulted with our ESNZ disciplines - jumping, eventing, dressage and para-equestrian - and also with the RAS [Royal Agricultural Society], who run the showing classes at HOY. RAS were also consulted on behalf of many A and P shows," Ms Glynn said.
"Every equestrian aspires to compete at HOY and we look forward to it continuing to be a celebration of all things equestrian in 2016. ESNZ values the international competition with the Australians and we hope more will cross the Tasman to be part of HOY at the earlier date."
Meanwhile, tenders for the management contract to run the show close tomorrow.
Earlier this year, after Horse of the Year (Hawke's Bay) Ltd revealed it had initiated a tender process, long-time HOY event manager Kevin Hansen said his company would not put in a bid.
Mr Hansen is now focused on developing new business opportunities in Australia.
The board has established an independent committee to assess the management contract bids and has said it will announce the successful tenderer by late May.