The postponed 2020 Guinness Six Nations campaigns will conclude in October, World Rugby has announced.
The governing body has also approved a schedule of autumn internationals.
International rugby was put on hold as a result of the coronavirus pandemic, with four Six Nations matches left to play.
Wales are set to face Scotland in the Six Nations, while the Italians must host England and Ireland has outstanding matches against Italy and France.
The rescheduled games will now take place on the weekends of October 24 and 31.
The Welsh Rugby Union confirmed Wales' match against Scotland would be postponed just a day before they were set to play in March.
A number of high profile figures had called for the fixture in Cardiff to be cancelled.
The fixture against Scotland would have been captain Alun Wyn Jones' 148th test match appearance.
Wales faced England a few days prior, which saw Jones' testicles grabbed by England prop Joe Marler. Marler was cited for the incident.
World Rugby has approved a temporary global player release window between October 24 and the first weekend of December.
This year's autumn Tests are then expected to be replaced by an eight-team tournament in which the Six Nations sides will be joined by Japan and Fiji.
World Rugby chairman Sir Bill Beaumont said: "The global Covid-19 pandemic has been unprecedented in its impact on society and sport.
"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."