There should be a flash banner here. There are 2 main reasons why you may not be able to see it:
  • You do not have the required version of Flash MX installed (v8.0+) in your browser
  • JavaScript is disabled in your browser

2013 Calendar
By Series

ADAC GT Masters
April 28 - Oschersleben
May 12 - Spa-Francorchamps
June 9 - Sachsenring
August 4 - Nürburgring
August 11 - Red Bull Ring
September 1 - Lausitzring
September 15 - Slovakia Ring
September 29 - Hockenheim

American Le Mans Series
March 16 - Sebring
April 20 - Long Beach
May 11 - Mazda Raceway Laguna Seca
July 6 - Lime Rock Park
July 21 - Canadian Tire Motorsport Park
August 11 - Road America
August 31 - Baltimore
September 21 - Circuit of the Americas
October 5 - Virginia International Raceway
October 19 - Petit Le Mans, Road Atlanta

Asian Le Mans Series
May 5 - Zhuhai
May 26 - Shanghai
July 7 - Ordos
August 4 - Inje
September 22 - Fuji
December 8 - Sentul

Australian GT Championship
February 10 - Bathurst
March 3 - Adelaide
May 26 - Philip Island
July 14 - Easter Crek 
August 4 - Queensland
November 10 - Highlands

Belgian Racing Car Championship
April 21 - Zolder
May 12 - Dijon-Prenois
June 9 - Spa-Francorchamps
July 27 - Spa-Francorchamps
September 8 - Spa-Francorchamps
October 13 - Zolder

Blancpain Endurance Series
April 14 - Monza
June 2 - Silverstone
June 30 - Paul Ricard
July 27 - Spa-Francorchamps
September 22 - Nürburgring

Britcar MSA British Endurance Championship
April 13 - Donington Park
May 11 - Silverstone
June 1 - Rockingham
July 28 - Brands Hatch 
August 17 - Snetterton
September 22 - Silverstone
November 2 - Donington Park

British GT Championship
April 1 - Oulton Park
May 6 - Rockingham 
May 26 - Silverstone
June 16 - Snetterton
August 11 - Brands Hatch
September 8 - Zandvoort
October 6 - Donington Park

Bute Motorsport GT Cup
April 28 - Donington
May 12 - Brands Hatch 
June 2 - Brands Hatch
July 13 - Oulton Park
August 18 - Silverstone
September 8 - Snetterton 
September 28 - Donington Park

Campeonato Brasileiro de GT
April 14 - Interlagos
May 26 - Santa Cruz do Sul
June 23 - Curitiba
July 28 - Tarumã
August 18 - Interlagos
September 8 - Curitiba
October 13 - Velopark
December 8 - Interlagos

Campeonato de España de GT
May 12 - Portimão
June 16 - Jerez
September 15 - Jarama
October 13 - Valencia
November 10 - Barcelona

Campeonato de Portugal de GT
March 24 - Braga
April 28 - Aragon 
May 26 - Estoril
June 30 - Porto
September 1 - Portimão

Campionato Italiano Gran Turismo
May 5 - Misano
May 26 - Imola
June 16 - Red Bull Ring
July 7 - Mugello
September 1 - Imola
September 15 - Vallelunga
October 20 - Monza

Classic Endurance Racing
April 7 - Imola
May 26 - Spa-Francorchamps
June 23 - Porto
September 21 - Nürburgring
October 6 - Paul Ricard
November 10 - Barcelona

Dutch GT Championship
June 9 - Assen
July 7 - Zandvoort
July 27 - Spa-Francorchamps
September 8 - Zandvoort
October 13 - Zandvoort

European Le Mans Series
April 13 - Silverstone
May 18 - Imola
July 20 - Red Bull Ring
September 14 - Hungaroring
September 28 - Paul Ricard

FFSA GT Tour
April 28 - Le Mans Bugatti
May 19 - Imola
June 9 - Spa-Francorchamps
July 7 - Val de Vienne
September 8 - Magny-Cours
October 13 - Lédenon
October 27 - Paul Ricard

FIA GT Series
Apri 1 - Nogaro
April 21 - Zolder
July 7 - Zandvoort
August 18 - Slovakia Ring
October 13 - Navarra
November 17 - TBA

FIA World Endurance Championship
April 14 - Silverstone
May 4 - Spa-Francorchamps
June 22/23 - Le Mans
September 1 - Interlagos
September 22 - Circuit of the Americas
October 20 - Fuji
November 10 - Shanghai
November 30 - Bahrain

Grand Am Rolex Sports Car Series
January 26/27 - Daytona
March 2 - Circuit of the Americas
April 6 - Barber Motorsports Park
April 20 - Road Atlanta
June 1 - Detroit Belle Isle
June 15 - Mid-Ohio Sports Car Course
June 30 - Watkins Glen
July 26 - Indianapolis
August 10 - Road America
August 17 - Kansas
September 8 - Mazda Raceway Laguna Seca
September 28 - Lime Rock Park

Group C Racing
April 14 - Barcelona
May 5 - Donington
May 26 - Spa-Francorchamps
June 16 - Nürburgring
July 28 - Silverstone
September 8 - Mugello
October 6 - Paul Ricard

GTSPRINT INTERNATIONAL SERIES
April 7 - Monza
May 19 - Brno
June 9 - Slovakia Ring
June 23 - Zolder
July 21 - Portimão
September 1 - Donington
September 29 - Imola
October 13 - Vallelunga

GT4 Trophy
May 19 - Silverstone
June 9 - Assen
July 27 - Spa-Francorchamps
August 17 - Anderstorp
October 13 - Zandvoort

Gulf 12 Hours
December 14 - Abu Dhabi

International GT Open
April 28 - Paul Ricard
May 12 - Portimão
June 2 - Nürburgring
June 16 - Jerez
July 14 - Silverstone
September 8 - Spa-Francorchamps
October 6 - Monza
November 10 - Barcelona

Le Mans 24 Hours
June 9 - Test Le Mans 
June 22/23 - Le Mans 

Macau GT Cup
November 17 - Macau

Nürburgring 24 Hours
May 19/20 - Nürburgring

Pirelli World Challenge
March 22 - St. Petersburg
April 19 - Long Beach
May 17 - Circuit of the Americas
May 31 - Detroit Belle Isle
July 4 - Lime Rock Park
July 12 - Toronto
August 4 - Mid-Ohio Sports Car Course
August 23 - Sonoma
October 4 - Houston

Radical European Masters
March 3 - Portimão
April 28 - Paul Ricard
July 14 - Silverstone
September 8 - Spa-Francorchamps
October 6 - Monza
November 10 - Barcelona

Radical SR3 Challenge
April 7 - Snetterton
May 12 - Brands Hatch
June 2 - Brands Hatch
July 6 - Oulton Park
August 18 - Silverstone
September 29 - Donington Park
October 27 - Snetterton

SPEED EuroSeries
March 23 - Monza
April 28 - Slovakia Ring
May 19 - Salzburgring
June 30 - Nürburgring
July 28 - Brands Hatch
September 8 - Dijon
September 29 - Spa-Francorchamps
October 13 - Navarra

Supercar Challenge
April 21 - Zolder
May 19 - Slovakia Ring
June 9 - Spa-Francorchamps
June 23 - Zolder
August 4 - Assen
September 8 - Zandvoort
September 29 - Spa-Francorchamps
October 20 - Assen

Super GT
April 7 - Okayama
April 29 - Fuji
May 19 - Yeongam  (non-championship)
June 16 - Sepang
July 28 - Sportsland SUGO
August 18 - Suzuka
September 8 - Fuji
October 6 - Autopolis
November 3 - Twin Ring Motegi
November 17 - Fuji  (non-championship)

Swedish GT
May 3 - Knutstorp
June 1 - Mantorp
June 29 - Göteborg
August 18 - Anderstorp
September 7 - Knutstorp
September 21 - Knutstorp

UAE GT Championship
December 14, 2012 - Dubai
January 25 - Abu Dhabi
February 22 - Dubai
March 8 - Dubai

VdeV Endurance GT/Touring + Proto
March 24 - Barcelona
April 21 - Mugello
June 2 - Paul Ricard
June 30 - Dijon
September 1 - Aragon
October 27 - Magny-Cours
November 17 - Estoril

VLN Langstrecken Meisterschaft Nürburgring
March 23 - Nürburgring
April 13 - Nürburgring
April 27 - Nürburgring
June 22 - Nürburgring
July 6 - Nürburgring
July 20 - Nürburgring
August 24 - Nürburgring
September 14 - Nürburgring
September 28 - Nürburgring
October 26 - Nürburgring

24H Series
January 11/12 - Dubai
February 10 - Bathurst
September 7/8 - Barcelona