INSEAD has announced its application deadlines for potential members of its class entering in the fall of 2013:
Round # Application Deadline: Interview Notification by: Final Decision:
1st 10/3/2012 11/9/2012 12/21/2012
2nd 12/5/2012 1/18/2013 3/1/2013
3rd 3/13/2013 4/19/2013 5/31/2013
The INSEAD dates and deadlines page mentions that in order to "be included in a specific round, applications must be complete and submitted by midnight (23:59) Central European Time on the day of the deadline".
Take care to understand thoroughly their admissions criteria, including the language requirements for entry to the program, the application checklist and the admissions FAQ for the school.