Rugby union's governing body released an official statement on Thursday to confirm temporary changes to the global calendar.
The first of the new temporary player release windows approved by World Rugby covers October 24 until December 5, with both the men’s and women’s Six Nations - suspended earlier this year due to the Covid-19 pandemic - to be completed across the weekends of October 24 and 31.
There will then be a rest weekend before four consecutive rounds of international fixtures, with England's men set to compete in a new eight-team autumn tournament involving the regular Six Nations teams plus Japan and Fiji.
That competition has been devised to cover the loss of the touring Southern Hemisphere superpowers, with Australia, New Zealand - who have been asked to host - and South Africa to contest the rescheduled and condensed Rugby Championship between November 7 and December 12.
England's men sat top of the Six Nations standings when the championship was suspended in March, ahead of France - who saw their Grand Slam dreams ended by a home defeat to Scotland - on points difference ahead of one final game against bottom side Italy in Rome.
Wales still have to play Scotland in Cardiff, while Ireland have two matches to complete against Italy (H) and France (A).
England Women are also in first place, with an eight-point buffer to rivals France, who have played one game fewer.
“The global COVID-19 pandemic has been unprecedented in its impact on society and sport and throughout this process, all parties have sought to deliver the best-possible outcome to support the interests of international and club rugby and the players," said World Rugby chairman Sir Bill Beaumont.
“Agreement and approval of this schedule is exciting for players and fans and an important step in supporting our unions in mitigating financial impact and optimising the sport’s return from the pandemic in an equitable way.
“These matches will be greatly anticipated by all, and I would like to thank unions, the international and club competitions and players for their input and the fans for their patience as we have sought to get international rugby back up and running.”