CAT 2015 will be held on 29 November 2015. Registrations for the same will commence from 6 August 2015.
To know more about the CAT Exam: http://www.careerlauncher.com/cat-mba/exams/cat.html
To know more about the IIMs: http://www.careerlauncher.com/cat-mba/bschools-eligibility/bschools.html
All the Best!
Team CL