Newmarket has revamped its autumn programme with the creation of the Future Champions Festival in October.
There will be more than £2m of prize money on offer over the two days, which sees three feature races brought together across one weekend.
The Dubai Fillies' Mile will be staged on Friday, 9 October, with the Dubai Dewhurst Stakes and Betfred Cesarewitch on Saturday, October 10.
It means the Dewhurst is no longer the same weekend as Ascot's Champions Day.
Last year the Dewhurst Stakes, Britain's top race for two-year-olds, was held just 24 hours before Champions Day, a scheduling decision which drew criticism.
But now there will be a week gap until Champions Day, the finale to the flat season, on 17 October.
Newmarket say there will be £500,000 more prize money available for the new two-day meeting, compared to the combination of Cesarewitch Day and Future Champions Day in 2014.
The Middle Park Stakes, which was held on Future Champions Day last year, has been brought forward to 26 September.
Local trainer John Gosden said: "This is a programme that will create a solid foundation which can be built upon for the future."