Please note that the accreditation deadline for this yearâ??s World Equestrian Festival in Aachen, Germany (May 29 -31) is April 30, 2015. Go to the website: chioaachen.de click on Services and then Media or go direct to: press-accreditation@chioaachen.de. Aachen have pushed forward their traditional CHIO from July to the new May date because they are staging the European Championships for five disciplines in August (11-23) .