Road Racing World Championship Grand Prix 2006 calendar – Change of date for Portuguese Grand Prix The Portuguese Grand Prix, scheduled on the circuit of Estoril, will be held on October 15 (instead of October 22). The 2006 Road Racing World Championship Grand Prix calendar is the following: March 26 Jerez, Spain April 8 Losail, Qatar ** April 30 Istanbul, Turkey May 14 Shanghai, China May 21 Le Mans, France June 4 Mugello, Italy June 18 Catalunya, Spain June 24 Assen, Netherlands ** July 2 Donington Park, Great Britain July 16 Sachsenring, Germany July 23 Laguna Seca, California, USA * August 20 Brno, Czech Republic September 10 Sepang, Malaysia September 17 Phillip Island, Australia September 24 Motegi, Japan October 15 Estoril, Portugal October 29 Valencia, Spain *: Only MotoGP class **: Saturday