As you have asked about the registration dates for management aptitude test, check information below

For applicants who have applied online last date for registration is 27th January, 2016

For applicants who affix the photograph and sign the printout of Registration Form
And
For applicants who make the payment through Demand Draft (DD) or Online Payment
And
For candidates who purchase the Registration Form against cash payment from AIMA Study Centres or from AIMA, New Delhi

Late Date for Online Filling-up/ Buying of Form: 23 January 2016 (Saturday)
And
Last Date for Submission of duly complete Printout of Registration Form at AIMA, New Delhi : 27 January 2016 (Wednesday)
Name of the activity Management Aptitude Test (MAT)
Mode of Test
(How to take the test) Candidate can choose any one of the two options to take the test

Paper Based Test
or
Computer Based Test
Test Date Paper Based Test Computer Based Test
07 February 2016(Sunday) 13 February 2016 (Saturday) onwards
If the number of candidates registered for Computer Based Test is limited and can be accommodated in a single day; the test will be completed on 13 February 2016 itself.
Test Timing
Paper Based Test 10.00am-12.30pm
Computer Based Test In different Time slots at specific test venues; subject to number of candidates registering for Computer Based Test.