The Availability Schedule of ADMAT Mocks/Workshops (Tests other than CAT) Mocks/workshops are released tentatively a month prior to the actual test date.
E-maximiser Workshops schedule is mentioned here: https://www.imsindia.com/ims-test-availability-schedule-cat-2022/
ADMAT Schedule: https://www.imsindia.com/admat-availability-schedule/
(Note: It is a tentative schedule & subject to change based on the release dates of the respective official tests)