The 2010 British MotoGP race at Silverstone will now take place on June 20, as was revealed by MCN yesterday.
The Silverstone date has been pushed back two weeks from June 6, with five dates changing on next years provisional calendar.
The Dutch GP at Assen and the Catalunya GP in Barcelona will immediately follow Silverstone on July 4 in a return to three back-to-back races.
Other dates to change are the French GP in Le Mans, which has been moved from May 16 to May 23.
And the Italian GP at Mugello will switch from May 30 to June 6.
The Czech Republic GP in Brno has been pushed back to August 22 and the Misano clash, originally scheduled for September 12 has been brought forward to September 5.
The new Balatonring in Hungary is back on the calendar in a September 19 slot, though the new Motorland Aragon Circuit in Spain is on standby.
Provisional 2010 MotoGP calendar
April 11th Losail Qatar
April 25th Twin Ring Motegi Japan
May 2nd Jerez Spain
May 23rd Le Mans France
June 6 Mugello Italy
June 20th Silverstone Great Britain
June 26th Assen Holland
July 4th Catalunya Spain
July 18th Sachsenring Germany
July 25th Laguna Seca USA
August 22nd Brno Czech Republic
August 29th Indianapolis USA
September 5th Misano San Marino
September 19th Balatonring Hungary
October 10th Sepang Malaysia
October 17th Phillip Island Australia
October 31st Estoril Portugal
November 7th Valencia Spain