Unconfirmed rumors are reporting that the organizers of the Tour de France, Giro and Vuelta are in agreement on new dates for the races this year. The Tour will be in August, Vuelta in September and the Giro in October.
The new unconfirmed date for Le Tour is August 2-25. There would be just one week in between each race. There has not been any info on the World Championships. France is not allowing any big events with crowds before the middle of July.
All this is dependent on what happens with the virus.
