Hi Drishti, 

AIIMS PG Examination is used for entrance into AIIMS Courses of DM/ M.Ch, M.D, M.D/,S/M.Ch, MDS. AIIMS Post Graduate, 2020 session will be tentative help around April-May. In 2019, it is taking place on the 5th of May. Therefore, it is reasonable to assume that it will take place around the same time next year as well.

If there is anything, you require to know more about the 2020 session, keep tuned to Careers 360: https://medicine.careers360.com/articles/aiims-pg-important-dates