When should I apply for CEMS MiM of University of St. Gallen, if my graduation is getting completed in May'19? Which is the earliest batch?

Hi Sagar, you have to be a registered Masters degree student at one of CEMS already, check their website it mentions it clearly. Please write to them. Here is also the CEMS main site https://www.cems.org/mim/how-to-apply.