The Columbia MBA program has updated their admissions website to reflect deadlines for those aiming to enter their program in January and August 2014.
January 2014 entry -
August 2014 entry -
Early Decision deadline: 10/2/2013
Merit Fellowship Consideration: 1/6/2014
Regular Decision deadline: 4/9/2014
Columbia employs a rolling admissions process. Read on (and verify all deadlines) at their admissions website.